diff --git a/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/content/[contentSlug]/page.tsx b/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/content/[contentSlug]/page.tsx
index 4bfc96a3..488b3bac 100644
--- a/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/content/[contentSlug]/page.tsx
+++ b/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/content/[contentSlug]/page.tsx
@@ -1,19 +1,14 @@
 import { createStrapiURL } from '@frameless/vth-frontend/src/util/createStrapiURL';
 import { fetchData } from '@frameless/vth-frontend/src/util/fetchData';
-import {
-  Heading1,
-  Heading2,
-  Link,
-  Paragraph,
-  UnorderedList,
-  UnorderedListItem,
-} from '@utrecht/component-library-react';
+import { Heading1 } from '@utrecht/component-library-react';
 import { Metadata } from 'next';
 import React from 'react';
 import { useTranslation } from '@/app/i18n';
 import { Grid } from '@/components/Grid';
 import { Markdown } from '@/components/Markdown';
+import { LinkData, SideNavigation } from '@/components/SideNavigation';
 import { GET_CONTENT_BY_SLUG } from '@/query';
+import { SiblingData } from '@/types';
 
 type Params = {
   params: {
@@ -39,31 +34,39 @@ const Thema = async ({ params: { locale, contentSlug } }: Params) => {
   });
 
   const { title, content, parents } = data.findSlug.data.attributes;
+  const parentSlug = parents?.data[0]?.attributes?.slug;
+  const siblingThemas: SiblingData[] = parents?.data[0]?.attributes?.child_themas?.data || [];
+  const siblingContent: SiblingData[] = parents?.data[0]?.attributes?.child_contents?.data || [];
+
+  const themasLinks =
+    siblingThemas?.map(({ attributes: { slug, title } }: SiblingData) => ({
+      title,
+      slug,
+      href: `/themas/${slug}`,
+      isCurrent: slug === contentSlug,
+    })) || [];
+
+  const contentLinks =
+    siblingContent?.map(({ attributes: { slug, title } }: SiblingData) => ({
+      title,
+      slug,
+      href: `/themas/${parentSlug}/content/${slug}`,
+      isCurrent: slug === contentSlug,
+    })) || [];
+
+  const sideNavigationLinks: LinkData[] = [...themasLinks, ...contentLinks];
 
   return (
     <Grid className={'utrecht-grid--content-padding'}>
       <div className={'utrecht-grid__two-third'}>
         <Heading1>{title}</Heading1>
         <Markdown strapiBackendURL={process.env.STRAPI_PUBLIC_URL}>{content}</Markdown>
-        <Heading2>Themas</Heading2>
-        {parents.data[0] ? (
-          <UnorderedList>
-            {parents.data &&
-              parents.data.map((content: any) => {
-                const { title, slug: parentSlug } = content.attributes;
-                return (
-                  <UnorderedListItem key={`thema-${parentSlug}`}>
-                    <Link href={`/themas/${parentSlug}`}>{title}</Link>
-                  </UnorderedListItem>
-                );
-              })}
-          </UnorderedList>
-        ) : (
-          <>
-            <Paragraph>Geen thema paginas verbonden.</Paragraph>
-          </>
-        )}
       </div>
+      {sideNavigationLinks.length > 0 && (
+        <div className={'utrecht-grid-mobile-hidden utrecht-grid__one-third'}>
+          <SideNavigation links={sideNavigationLinks} />
+        </div>
+      )}
     </Grid>
   );
 };
diff --git a/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/page.tsx b/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/page.tsx
index 40c63cc4..0d87f69c 100644
--- a/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/page.tsx
+++ b/apps/vth-frontend/src/app/[locale]/themas/[themaSlug]/page.tsx
@@ -7,8 +7,10 @@ import { useTranslation } from '@/app/i18n';
 import { Card } from '@/components/Card';
 import { Grid } from '@/components/Grid';
 import { Markdown } from '@/components/Markdown';
+import { LinkData, SideNavigation } from '@/components/SideNavigation';
 import { GET_THEMA_BY_SLUG } from '@/query';
 import { buildImgURL } from '@/util/buildImgURL';
+import { SiblingData } from '@/types';
 
 type Params = {
   params: {
@@ -33,47 +35,75 @@ const Thema = async ({ params: { locale, themaSlug } }: Params) => {
     variables: { slug: themaSlug, locale: locale },
   });
 
-  const { title, content, child_themas, child_contents } = data.findSlug.data.attributes;
+  const { title, content, parents, child_themas, child_contents } = data.findSlug.data.attributes;
+  const parentSlug = parents?.data[0]?.attributes?.slug;
+  const siblingThemas: SiblingData[] = parents?.data[0]?.attributes?.child_themas?.data || [];
+  const siblingContent: SiblingData[] = parents?.data[0]?.attributes?.child_contents?.data || [];
+
+  const themasLinks =
+    siblingThemas?.map(({ attributes: { slug, title } }: SiblingData) => ({
+      title,
+      slug,
+      href: `/themas/${slug}`,
+      isCurrent: slug === themaSlug,
+    })) || [];
+
+  const contentLinks =
+    siblingContent?.map(({ attributes: { slug, title } }: SiblingData) => ({
+      title,
+      slug,
+      href: `/themas/${parentSlug}/content/${slug}`,
+      isCurrent: slug === themaSlug,
+    })) || [];
+
+  const sideNavigationLinks: LinkData[] = [...themasLinks, ...contentLinks];
 
   return (
     <Grid className={'utrecht-grid--content-padding'}>
-      <div className={'utrecht-grid__two-third'}>
-        <Heading1>{title}</Heading1>
-        <Markdown strapiBackendURL={process.env.STRAPI_PUBLIC_URL}>{content}</Markdown>
-      </div>
-      <Grid className={'utrecht-grid__full-width'}>
-        {child_themas.data[0] &&
-          child_themas.data.map((thema: any) => {
-            const { title, description, slug: childSlug, previewImage: imageData } = thema.attributes;
-            const imageUrl = imageData?.data?.attributes?.url;
-            return (
-              <Card
-                className={'utrecht-grid__one-third'}
-                image={{ url: imageUrl && buildImgURL(imageUrl), alt: '' }}
-                title={title}
-                description={description}
-                key={`thema-${childSlug}`}
-                link={{ href: `/themas/${childSlug}` }}
-              />
-            );
-          })}
-        {child_contents.data[0] &&
-          child_contents.data &&
-          child_contents.data.map((content: any) => {
-            const { title, description, slug: contentSlug, previewImage: imageData } = content.attributes;
-            const imageUrl = imageData?.data?.attributes?.url;
-            return (
-              <Card
-                className={'utrecht-grid__one-third'}
-                title={title}
-                description={description}
-                key={`thema-${contentSlug}`}
-                image={{ url: imageUrl && buildImgURL(imageUrl), alt: '' }}
-                link={{ href: `/themas/${themaSlug}/content/${contentSlug}` }}
-              />
-            );
-          })}
+      <Grid className={'utrecht-grid__two-third'}>
+        <div className={'utrecht-grid__full-width'}>
+          <Heading1>{title}</Heading1>
+          <Markdown strapiBackendURL={process.env.STRAPI_PUBLIC_URL}>{content}</Markdown>
+        </div>
+        <Grid className={'utrecht-grid__full-width'}>
+          {child_themas.data[0] &&
+            child_themas.data.map((thema: any) => {
+              const { title, description, slug: childSlug, previewImage: imageData } = thema.attributes;
+              const imageUrl = imageData?.data?.attributes?.url;
+              return (
+                <Card
+                  className={'utrecht-grid__half-width'}
+                  image={{ url: imageUrl && buildImgURL(imageUrl), alt: '' }}
+                  title={title}
+                  description={description}
+                  key={`thema-${childSlug}`}
+                  link={{ href: `/themas/${childSlug}` }}
+                />
+              );
+            })}
+          {child_contents.data[0] &&
+            child_contents.data &&
+            child_contents.data.map((content: any) => {
+              const { title, description, slug: contentSlug, previewImage: imageData } = content.attributes;
+              const imageUrl = imageData?.data?.attributes?.url;
+              return (
+                <Card
+                  className={'utrecht-grid__half-width'}
+                  title={title}
+                  description={description}
+                  key={`thema-${contentSlug}`}
+                  image={{ url: imageUrl && buildImgURL(imageUrl), alt: '' }}
+                  link={{ href: `/themas/${themaSlug}/content/${contentSlug}` }}
+                />
+              );
+            })}
+        </Grid>
       </Grid>
+      {sideNavigationLinks.length > 0 && (
+        <div className={'utrecht-grid-mobile-hidden utrecht-grid__one-third'}>
+          <SideNavigation links={sideNavigationLinks} />
+        </div>
+      )}
     </Grid>
   );
 };
diff --git a/apps/vth-frontend/src/components/Grid/index.style.css b/apps/vth-frontend/src/components/Grid/index.style.css
index 01eae1b6..a5a1348e 100644
--- a/apps/vth-frontend/src/components/Grid/index.style.css
+++ b/apps/vth-frontend/src/components/Grid/index.style.css
@@ -8,6 +8,10 @@
   padding-block-end: 0;
 }
 
+.utrecht-grid-mobile-hidden {
+  display: none;
+}
+
 .utrecht-grid--content-padding {
   padding-block-start: 1rem;
   padding-inline-end: 1rem;
@@ -63,6 +67,10 @@
     grid-template-columns: repeat(12, 1fr);
   }
 
+  .utrecht-grid-mobile-hidden {
+    display: unset;
+  }
+
   .utrecht-grid__half-width {
     grid-column: span 6;
   }
diff --git a/apps/vth-frontend/src/components/SideNavigation/index.tsx b/apps/vth-frontend/src/components/SideNavigation/index.tsx
new file mode 100644
index 00000000..1bc4a156
--- /dev/null
+++ b/apps/vth-frontend/src/components/SideNavigation/index.tsx
@@ -0,0 +1,42 @@
+import clsx from 'clsx';
+import Link from 'next/link';
+import React, { FC } from 'react';
+
+export type LinkData = {
+  title: string;
+  slug: string;
+  href: string;
+  isCurrent: boolean;
+};
+
+export type SideNavigationProps = {
+  links: LinkData[];
+};
+
+export const SideNavigation: FC<SideNavigationProps> = (props) => {
+  const buildNavItem = (slug: string, title: string, href: string, isCurrent: boolean) => {
+    return (
+      <li
+        key={`sidenav-thema-${slug}`}
+        className={clsx('utrecht-sidenav__item', { 'utrecht-sidenav__item--current': isCurrent })}
+      >
+        <Link
+          aria-current={isCurrent ? 'page' : 'false'}
+          className={clsx('utrecht-sidenav__link', { 'utrecht-sidenav__link--current': isCurrent })}
+          href={href}
+        >
+          <div className={clsx('utrecht-sidenav__marker', { 'utrecht-sidenav__marker--current': isCurrent })}></div>
+          {title}
+        </Link>
+      </li>
+    );
+  };
+
+  return (
+    <nav className={'utrecht-sidenav'}>
+      <ul className={'utrecht-sidenav__list'}>
+        {props.links.map(({ slug, title, href, isCurrent }: LinkData) => buildNavItem(slug, title, href, isCurrent))}
+      </ul>
+    </nav>
+  );
+};
diff --git a/apps/vth-frontend/src/query/index.ts b/apps/vth-frontend/src/query/index.ts
index 1933a4f0..71816a69 100644
--- a/apps/vth-frontend/src/query/index.ts
+++ b/apps/vth-frontend/src/query/index.ts
@@ -62,13 +62,21 @@ query GET_THEMA_BY_SLUG($slug: String) {
           parents {
             data {
               attributes {
-                title,
-                slug,
-                description,
-                previewImage {
+                title
+                slug
+                child_themas {
                   data {
                     attributes {
-                      url
+                      title
+                      slug
+                    }
+                  }
+                }
+                child_contents {
+                  data {
+                    attributes {
+                      title
+                      slug
                     }
                   }
                 }
@@ -125,12 +133,21 @@ query GET_CONTENT_BY_SLUG($slug: String) {
           parents {
             data {
               attributes {
-                title,
+                title
                 slug
-                previewImage {
+                child_themas {
                   data {
                     attributes {
-                      url
+                      title
+                      slug
+                    }
+                  }
+                }
+                child_contents {
+                  data {
+                    attributes {
+                      title
+                      slug
                     }
                   }
                 }
diff --git a/apps/vth-frontend/src/styles/globals.css b/apps/vth-frontend/src/styles/globals.css
index 9ebb61c3..45dafbc7 100644
--- a/apps/vth-frontend/src/styles/globals.css
+++ b/apps/vth-frontend/src/styles/globals.css
@@ -138,13 +138,16 @@ a {
   object-fit: cover;
 }
 
-.utrecht-navigation__toggle-button {
-  float: right;
-  position: absolute;
-}
-
 .utrecht-navigation {
   border-block-end-color: var(--utrecht-navigation-border-block-start-color);
   border-block-end-style: solid;
   border-block-end-width: var(--utrecht-navigation-border-block-start-width);
 }
+
+.utrecht-sidenav {
+  border-block-end: none;
+}
+
+.utrecht-sidenav__item {
+  border-block-end: 1px solid var(--utrecht-color-grey-80);
+}
diff --git a/apps/vth-frontend/src/types/index.ts b/apps/vth-frontend/src/types/index.ts
index afc561cc..4873a328 100644
--- a/apps/vth-frontend/src/types/index.ts
+++ b/apps/vth-frontend/src/types/index.ts
@@ -42,24 +42,9 @@ export interface Timing {
   request: number;
 }
 
-export interface SearchResult {
-  total: number;
-  hits: Hit[];
-  request: Request;
-  received: Received;
-  pagination: Pagination;
-  timing: Timing;
-}
-
-export interface SuggestedResult {
-  suggestedHits: SuggestedHits;
-  suggestions: Suggestions;
-}
-
-export type SuggestedHits = {
-  titleRaw: string;
-  url: string;
-};
-export type Suggestions = {
-  text: string;
+export type SiblingData = {
+  attributes: {
+    slug: string;
+    title: string;
+  };
 };