diff --git a/themes/2026/assets/css/content.css b/themes/2026/assets/css/content.css
index fe5e877b..e6d82c0b 100644
--- a/themes/2026/assets/css/content.css
+++ b/themes/2026/assets/css/content.css
@@ -858,6 +858,49 @@ aside section dl > div {
     padding-top: var(--space-2);
 }
 
+body:has(> header.article-header) > main > aside.article-complementary-images {
+    width: min(100%, var(--max-width-reading));
+    margin-inline: auto;
+    margin-top: var(--space-6);
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section {
+    margin-top: 0;
+    border-top: 1px solid var(--color-border);
+    padding-top: var(--space-3);
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section > h2 {
+    margin-top: 0;
+    font-size: 1.02rem;
+    text-transform: uppercase;
+    letter-spacing: 0.08em;
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section > ul {
+    list-style: none;
+    margin-top: var(--space-3);
+    padding-left: 0;
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
+    gap: var(--space-3);
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section > ul > li {
+    margin-top: 0;
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section > ul > li > a {
+    display: block;
+    border: 1px solid var(--color-border);
+}
+
+body:has(> header.article-header) > main > aside.article-complementary-images > section > ul > li > a > img {
+    width: 100%;
+    height: auto;
+    display: block;
+}
+
 body:has(> header.article-header) > main > aside.article-toc {
     position: fixed;
     inset-inline-end: var(--space-2);
diff --git a/themes/2026/layouts/_partials/asides/complementary-images.html b/themes/2026/layouts/_partials/asides/complementary-images.html
new file mode 100644
index 00000000..3a9ab37e
--- /dev/null
+++ b/themes/2026/layouts/_partials/asides/complementary-images.html
@@ -0,0 +1,115 @@
+{{- $page := . -}}
+{{- $bundleImages := slice -}}
+{{- range $page.Resources.ByType "image" -}}
+  {{- if strings.HasPrefix .Name "images/" -}}
+    {{- $bundleImages = $bundleImages | append . -}}
+  {{- end -}}
+{{- end -}}
+
+{{- if gt (len $bundleImages) 0 -}}
+  {{- $coverPath := "" -}}
+  {{- with $page.Params.cover -}}
+    {{- $coverPath = strings.TrimSpace (printf "%v" .) -}}
+  {{- end -}}
+  {{- $coverImagePath := "" -}}
+  {{- if ne $coverPath "" -}}
+    {{- $coverPathLower := lower $coverPath -}}
+    {{- if or (strings.HasSuffix $coverPathLower ".yaml") (strings.HasSuffix $coverPathLower ".yml") -}}
+      {{- $coverDataFile := $page.Resources.GetMatch $coverPath -}}
+      {{- if $coverDataFile -}}
+        {{- $coverData := $coverDataFile.Content | transform.Unmarshal -}}
+        {{- with index $coverData "file" -}}
+          {{- $coverImagePath = strings.TrimSpace (printf "%v" .) -}}
+        {{- end -}}
+      {{- end -}}
+    {{- else -}}
+      {{- $coverImagePath = $coverPath -}}
+    {{- end -}}
+  {{- end -}}
+  {{- $coverImageName := "" -}}
+  {{- if ne $coverImagePath "" -}}
+    {{- $coverImageName = lower (path.Base $coverImagePath) -}}
+  {{- end -}}
+
+  {{- $contentImageNames := slice -}}
+  {{- $contentImageStems := slice -}}
+  {{- $imageTags := findRE `(?is)<img[^>]+src=["'][^"']+["'][^>]*>` .Content -}}
+  {{- range $imageTags -}}
+    {{- $srcMatch := findRESubmatch `(?is)src=["']([^"']+)["']` . -}}
+    {{- if gt (len $srcMatch) 0 -}}
+      {{- $src := lower (index (index $srcMatch 0) 1) -}}
+      {{- if or (in $src "/images/") (strings.HasPrefix $src "images/") (strings.HasPrefix $src "./images/") -}}
+        {{- $srcName := path.Base $src -}}
+        {{- $srcName = replaceRE "\\?.*$" "" $srcName -}}
+        {{- $srcName = replaceRE "#.*$" "" $srcName -}}
+        {{- $srcName = replaceRE "_hu_[^.]*" "" $srcName -}}
+        {{- $srcStem := $srcName | replaceRE "\\.[^.]+$" "" -}}
+        {{- $contentImageNames = $contentImageNames | append $srcName -}}
+        {{- $contentImageStems = $contentImageStems | append $srcStem -}}
+      {{- end -}}
+    {{- end -}}
+  {{- end -}}
+
+  {{- $unusedImages := slice -}}
+  {{- range $bundleImages -}}
+    {{- $imageName := path.Base .Name -}}
+    {{- $imageNameLower := lower $imageName -}}
+    {{- $isCoverImage := false -}}
+    {{- if and (ne $coverImageName "") (eq $imageNameLower $coverImageName) -}}
+      {{- $isCoverImage = true -}}
+    {{- end -}}
+
+    {{- if not $isCoverImage -}}
+      {{- $imageStem := $imageName | replaceRE "\\.[^.]+$" "" -}}
+      {{- $imageStemLower := lower $imageStem -}}
+      {{- $isUsedInContent := false -}}
+      {{- range $contentImageNames -}}
+        {{- if eq . $imageNameLower -}}
+          {{- $isUsedInContent = true -}}
+        {{- end -}}
+      {{- end -}}
+      {{- if not $isUsedInContent -}}
+        {{- range $contentImageStems -}}
+          {{- if eq . $imageStemLower -}}
+            {{- $isUsedInContent = true -}}
+          {{- end -}}
+        {{- end -}}
+      {{- end -}}
+      {{- if not $isUsedInContent -}}
+        {{- $unusedImages = $unusedImages | append . -}}
+      {{- end -}}
+    {{- end -}}
+  {{- end -}}
+
+  {{- if gt (len $unusedImages) 0 -}}
+<aside class="article-complementary-images">
+  <section>
+    <h2>Images complémentaires</h2>
+    <ul>
+      {{- range $unusedImages -}}
+        {{- $imageName := path.Base .Name -}}
+        {{- $imageStem := $imageName | replaceRE "\\.[^.]+$" "" -}}
+        {{- $data := dict -}}
+        {{- $dataFile := $page.Resources.Get (printf "data/images/%s.yaml" $imageStem) -}}
+        {{- if not $dataFile -}}
+          {{- $dataFile = $page.Resources.Get (printf "data/%s.yaml" $imageStem) -}}
+        {{- end -}}
+        {{- if $dataFile -}}
+          {{- $data = $dataFile.Content | transform.Unmarshal -}}
+        {{- end -}}
+        {{- $title := default (printf "Image complémentaire : %s" $imageName) (index $data "title") -}}
+        {{- $thumbnail := . -}}
+        {{- if and (ne .MediaType.SubType "svg") (gt .Width 360) -}}
+          {{- $thumbnail = .Resize "360x" -}}
+        {{- end -}}
+      <li>
+        <a href="{{ .RelPermalink }}" title="{{ $title }}">
+          <img src="{{ $thumbnail.RelPermalink }}" alt="{{ $title }}" loading="lazy" decoding="async">
+        </a>
+      </li>
+      {{- end -}}
+    </ul>
+  </section>
+</aside>
+  {{- end -}}
+{{- end -}}
diff --git a/themes/2026/layouts/liens-morts/single.html b/themes/2026/layouts/liens-morts/single.html
index 1687c95c..66cf7d1a 100644
--- a/themes/2026/layouts/liens-morts/single.html
+++ b/themes/2026/layouts/liens-morts/single.html
@@ -6,6 +6,7 @@
     {{ partial "liens-morts/report.html" (dict "Page" .) }}
     {{ partial "article-footer.html" . }}
   </article>
+  {{ partial "asides/complementary-images.html" . }}
   {{ partial "asides/toc.html" . }}
 </main>
 {{ end }}
diff --git a/themes/2026/layouts/page.html b/themes/2026/layouts/page.html
index 113cb180..0f898be0 100644
--- a/themes/2026/layouts/page.html
+++ b/themes/2026/layouts/page.html
@@ -5,6 +5,7 @@
     {{ .Content }}
     {{ partial "article-footer.html" . }}
   </article>
+  {{ partial "asides/complementary-images.html" . }}
   {{ partial "asides/toc.html" . }}
 </main>
 {{ end }}