diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index cb6d30caff..1b680335b0 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -38,6 +38,7 @@
 #include <LibWeb/HTML/Focus.h>
 #include <LibWeb/HTML/Location.h>
 #include <LibWeb/HTML/MessageEvent.h>
+#include <LibWeb/HTML/Navigation.h>
 #include <LibWeb/HTML/Navigator.h>
 #include <LibWeb/HTML/Origin.h>
 #include <LibWeb/HTML/PageTransitionEvent.h>
@@ -106,6 +107,7 @@ void Window::visit_edges(JS::Cell::Visitor& visitor)
     visitor.visit(m_location);
     visitor.visit(m_crypto);
     visitor.visit(m_navigator);
+    visitor.visit(m_navigation);
     visitor.visit(m_custom_element_registry);
     for (auto& plugin_object : m_pdf_viewer_plugin_objects)
         visitor.visit(plugin_object);
@@ -1410,6 +1412,20 @@ JS::NonnullGCPtr<Crypto::Crypto> Window::crypto()
     return JS::NonnullGCPtr { *m_crypto };
 }
 
+// https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-navigation
+JS::NonnullGCPtr<Navigation> Window::navigation()
+{
+    // Upon creation of the Window object, its navigation API must be set
+    // to a new Navigation object created in the Window object's relevant realm.
+    if (!m_navigation) {
+        auto& realm = relevant_realm(*this);
+        m_navigation = heap().allocate<Navigation>(realm, realm);
+    }
+
+    // The navigation getter steps are to return this's navigation API.
+    return *m_navigation;
+}
+
 // https://html.spec.whatwg.org/multipage/custom-elements.html#dom-window-customelements
 JS::NonnullGCPtr<CustomElementRegistry> Window::custom_elements()
 {
diff --git a/Userland/Libraries/LibWeb/HTML/Window.h b/Userland/Libraries/LibWeb/HTML/Window.h
index dcdbf161f0..1513238e4b 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.h
+++ b/Userland/Libraries/LibWeb/HTML/Window.h
@@ -136,6 +136,7 @@ public:
     void set_name(String const&);
     [[nodiscard]] JS::NonnullGCPtr<Location> location();
     JS::NonnullGCPtr<History> history() const;
+    JS::NonnullGCPtr<Navigation> navigation();
     void focus();
 
     JS::NonnullGCPtr<WindowProxy> frames() const;
@@ -226,6 +227,9 @@ private:
     JS::GCPtr<Navigator> m_navigator;
     JS::GCPtr<Location> m_location;
 
+    // https://html.spec.whatwg.org/multipage/nav-history-apis.html#window-navigation-api
+    JS::GCPtr<Navigation> m_navigation;
+
     // https://html.spec.whatwg.org/multipage/custom-elements.html#custom-elements-api
     // Each Window object is associated with a unique instance of a CustomElementRegistry object, allocated when the Window object is created.
     JS::GCPtr<CustomElementRegistry> m_custom_element_registry;
diff --git a/Userland/Libraries/LibWeb/HTML/Window.idl b/Userland/Libraries/LibWeb/HTML/Window.idl
index 4d7549cb7d..5fad9dd00b 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.idl
+++ b/Userland/Libraries/LibWeb/HTML/Window.idl
@@ -8,6 +8,7 @@
 #import <HighResolutionTime/Performance.idl>
 #import <HTML/AnimationFrameProvider.idl>
 #import <HTML/CustomElements/CustomElementRegistry.idl>
+#import <HTML/Navigation.idl>
 #import <HTML/Navigator.idl>
 #import <HTML/WindowLocalStorage.idl>
 #import <HTML/WindowOrWorkerGlobalScope.idl>
@@ -24,6 +25,7 @@ interface Window : EventTarget {
     attribute DOMString name;
     [PutForwards=href, LegacyUnforgeable] readonly attribute Location location;
     readonly attribute History history;
+    readonly attribute Navigation navigation;
     readonly attribute CustomElementRegistry customElements;
     undefined focus();