diff --git a/agaric/templates/block/block--system-branding-block.html.twig b/agaric/templates/block/block--system-branding-block.html.twig
new file mode 100644
index 0000000..266f6d3
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+++ b/agaric/templates/block/block--system-branding-block.html.twig
@@ -0,0 +1,47 @@
+{#
+/**
+ * @file
+ * Default theme implementation for a branding block.
+ *
+ * Each branding element variable (logo, name, slogan) is only available if
+ * enabled in the block configuration.
+ *
+ * Available variables:
+ * - site_logo: Logo for site as defined in Appearance or theme settings.
+ * - site_name: Name for site as defined in Site information settings.
+ * - site_slogan: Slogan for site as defined in Site information settings.
+ *
+ * @ingroup themeable
+ */
+#}
+{% block content %}
+<svg version="1.1" id="logo" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+  viewBox="0 0 95 37" style="enable-background:new 0 0 95 37;" xml:space="preserve" role="img" aria-label="agaric">
+  <title>agaric</title>
+  <path class="logo-color" d="M13,8.8c-0.7-0.8-1.5-1.3-2.4-1.7C9.7,6.7,8.8,6.5,7.8,6.5c-2.2,0-4,0.8-5.5,2.5C0.8,10.6,0,12.7,0,15.3
+    c0,2.5,0.8,4.5,2.3,6.2c1.6,1.7,3.4,2.5,5.5,2.5c1,0,1.8-0.2,2.7-0.5c0.8-0.3,1.6-0.9,2.4-1.7v1.8h4.2V6.9H13V8.8z M11.9,18.8
+    c-0.9,0.9-1.9,1.4-3.2,1.4c-1.3,0-2.3-0.5-3.2-1.4c-0.9-0.9-1.3-2.1-1.3-3.5c0-1.4,0.4-2.6,1.3-3.5c0.8-0.9,1.9-1.4,3.2-1.4
+    c1.3,0,2.4,0.4,3.3,1.3c0.9,0.9,1.3,2.1,1.3,3.5C13.2,16.7,12.7,17.9,11.9,18.8z"/>
+  <path class="logo-color" d="M55.5,23.5V6.9h-4.2v1.8c-0.7-0.8-1.5-1.3-2.4-1.7c-0.9-0.4-1.8-0.6-2.8-0.6c-2.2,0-4,0.8-5.5,2.5
+    c-1.5,1.6-2.3,3.7-2.3,6.3c0,2.5,0.8,4.5,2.3,6.2c1.6,1.7,3.4,2.5,5.5,2.5c1,0,1.8-0.2,2.7-0.5c0.8-0.3,1.6-0.9,2.4-1.7v1.8H55.5z
+     M50.2,18.8c-0.9,0.9-1.9,1.4-3.2,1.4c-1.3,0-2.3-0.5-3.2-1.4c-0.9-0.9-1.3-2.1-1.3-3.5c0-1.4,0.4-2.6,1.3-3.5
+    c0.8-0.9,1.9-1.4,3.2-1.4c1.3,0,2.4,0.4,3.3,1.3c0.9,0.9,1.3,2.1,1.3,3.5C51.5,16.7,51.1,17.9,50.2,18.8z"/>
+  <path class="logo-color" d="M86.8,20.1c-1.5,0-2.7-0.4-3.6-1.3c-0.9-0.9-1.4-2-1.4-3.4c0-1.4,0.5-2.6,1.4-3.6c1-0.9,2.2-1.4,3.8-1.4
+    c0.9,0,1.6,0.1,2.2,0.4c0.6,0.3,1.3,0.7,1.9,1.4l3.5-1.9c-0.8-1.2-1.9-2.1-3.2-2.8c-1.3-0.7-2.8-1-4.4-1c-1.8,0-3.4,0.4-4.8,1.2
+    c-1.4,0.8-2.6,1.8-3.4,3.2c-0.8,1.3-1.2,2.8-1.2,4.4c0,2.3,0.8,4.3,2.5,6.1c1.6,1.7,3.9,2.6,6.8,2.6c3.2,0,5.7-1.2,7.5-3.5
+    l-3.3-2.2C90.1,19.5,88.6,20.1,86.8,20.1z"/>
+  <path class="logo-color" d="M34.2,5.7l-1.7,1.7c-1.1-0.6-2.4-1-3.7-1c-7.6,0-9.1,5.6-9.1,8.7c0,1.6,0.4,3.9,1.9,5.7
+    c-1.4,2.2-2.9,6.2-1.7,9.8c0.3,1.4,1.1,2.6,2.3,3.7c1.6,1.5,3.6,2.2,5.9,2.2c0,0,0,0,0,0c0,0,0,0,0,0c2.3,0,4.3-0.7,5.9-2.2
+    c1.6-1.5,2.4-3.3,2.4-5.4c0-2.2-1.4-3.2-3.3-3.2h-9.7c0.3-1.1,0.7-2.1,1.1-2.7c1.2,0.5,2.6,0.8,4.3,0.8c2.2,0,4.1-0.8,5.6-2.5
+    c1.5-1.6,2.3-3.7,2.3-6.2c0-2-0.5-3.7-1.4-5.1l1.7-1.7L34.2,5.7z M32.6,29.5c-0.1,0.9-0.5,1.6-1.2,2.2c-0.9,0.9-2,1.3-3.4,1.3
+    c0,0,0,0-0.1,0l0,0l0,0c0,0,0,0-0.1,0c-1.4,0-2.4-0.4-3.4-1.3c-0.7-0.7-1.1-1.4-1.2-2.2H32.6z M31.2,18.7c-0.9,0.9-1.9,1.4-3.2,1.4
+    c-1.3,0-2.4-0.5-3.2-1.4c-0.9-0.9-1.3-2.1-1.3-3.6c0-1.4,0.4-2.6,1.3-3.5c0.9-0.9,1.9-1.3,3.3-1.3c1.3,0,2.4,0.5,3.2,1.4
+    c0.8,0.9,1.3,2.1,1.3,3.5C32.5,16.6,32.1,17.8,31.2,18.7z"/>
+  <rect x="71.4" y="6.9" class="logo-color" width="4.2" height="16.6"/>
+  <circle class="logo-color" cx="73.5" cy="2.7" r="2.7"/>
+  <rect x="38.3" y="25.9" class="logo-color" width="55.6" height="3.6"/>
+  <rect x="0.8" y="25.9" class="logo-color" width="16.4" height="3.6"/>
+  <path class="logo-color" d="M58.3,6.9v16.6h4.1v-8.6c0-3.2,1-4.7,3.1-4.7c0.7,0,1.4,0.3,2.1,0.8l1.8-3.5c-1.1-0.7-2.2-1-3.2-1
+    c-0.8,0-1.4,0.1-2,0.4c-0.5,0.3-1.2,0.8-1.9,1.5V6.9H58.3z"/>
+</svg>
+{% endblock %}