diff --git a/core/themes/classy/templates/block--system-branding-block.html.twig b/core/themes/classy/templates/block--system-branding-block.html.twig
new file mode 100644
index 0000000..5a34b7e
--- /dev/null
+++ b/core/themes/classy/templates/block--system-branding-block.html.twig
@@ -0,0 +1,32 @@
+{% extends "@block/block.html.twig" %}
+{#
+/**
+ * @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 %}
+ {% if site_logo %}
+
+
+
+ {% endif %}
+ {% if site_name %}
+
+ {% endif %}
+{% endblock %}
diff --git a/core/themes/classy/templates/block--system-menu-block.html.twig b/core/themes/classy/templates/block--system-menu-block.html.twig
new file mode 100644
index 0000000..f64b4af
--- /dev/null
+++ b/core/themes/classy/templates/block--system-menu-block.html.twig
@@ -0,0 +1,57 @@
+{#
+/**
+ * @file
+ * Default theme implementation for a menu block.
+ *
+ * Available variables:
+ * - plugin_id: The ID of the block implementation.
+ * - label: The configured label of the block if visible.
+ * - configuration: A list of the block's configuration values.
+ * - label: The configured label for the block.
+ * - label_display: The display settings for the label.
+ * - module: The module that provided this block plugin.
+ * - cache: The cache settings.
+ * - Block plugin specific settings will also be stored here.
+ * - block - The full block entity.
+ * - label_hidden: The hidden block title value if the block was
+ * configured to hide the title ('label' is empty in this case).
+ * - module: The module that generated the block.
+ * - delta: An ID for the block, unique within each module.
+ * - region: The block region embedding the current block.
+ * - content: The content of this block.
+ * - attributes: HTML attributes for the containing element.
+ * - id: A valid HTML ID and guaranteed unique.
+ * - title_attributes: HTML attributes for the title element.
+ * - content_attributes: HTML attributes for the content element.
+ * - title_prefix: Additional output populated by modules, intended to be
+ * displayed in front of the main title tag that appears in the template.
+ * - title_suffix: Additional output populated by modules, intended to be
+ * displayed after the main title tag that appears in the template.
+ *
+ * Headings should be used on navigation menus that consistently appear on
+ * multiple pages. When this menu block's label is configured to not be
+ * displayed, it is automatically made invisible using the 'visually-hidden' CSS
+ * class, which still keeps it visible for screen-readers and assistive
+ * technology. Headings allow screen-reader and keyboard only users to navigate
+ * to or skip the links.
+ * See http://juicystudio.com/article/screen-readers-display-none.php and
+ * http://www.w3.org/TR/WCAG-TECHS/H42.html for more information.
+ *
+ * @ingroup themeable
+ */
+#}
+{% set heading_id = attributes.id ~ '-menu'|clean_id %}
+
diff --git a/core/themes/classy/templates/breadcrumb.html.twig b/core/themes/classy/templates/breadcrumb.html.twig
new file mode 100644
index 0000000..0331409
--- /dev/null
+++ b/core/themes/classy/templates/breadcrumb.html.twig
@@ -0,0 +1,27 @@
+{#
+/**
+ * @file
+ * Default theme implementation for a breadcrumb trail.
+ *
+ * Available variables:
+ * - breadcrumb: Breadcrumb trail items.
+ *
+ * @ingroup themeable
+ */
+#}
+{% if breadcrumb %}
+
+{% endif %}