diff --git a/wp-content/themes/twentythirteen/functions.php b/wp-content/themes/twentythirteen/functions.php
index 13e39aca27..406941e4ee 100644
--- a/wp-content/themes/twentythirteen/functions.php
+++ b/wp-content/themes/twentythirteen/functions.php
@@ -500,22 +500,6 @@ function twentythirteen_get_link_url() {
 	return ( $has_url ) ? $has_url : apply_filters( 'the_permalink', get_permalink() );
 }
 
-/**
- * Sets the image size in featured galleries to large.
- *
- * @since Twenty Thirteen 1.0
- *
- * @param array $atts Combined and filtered attribute list.
- * @return array The filtered attribute list.
- */
-function twentythirteen_gallery_atts( $atts ) {
-	if ( has_post_format( 'gallery' ) && ! is_single() )
-		$atts['size'] = wp_is_mobile() ? 'thumbnail' : 'medium';
-
-	return $atts;
-}
-add_filter( 'shortcode_atts_gallery', 'twentythirteen_gallery_atts' );
-
 /**
  * Extends the default WordPress body classes.
  *
diff --git a/wp-content/themes/twentythirteen/rtl.css b/wp-content/themes/twentythirteen/rtl.css
index 70cc7a5408..36c6ef7fc5 100644
--- a/wp-content/themes/twentythirteen/rtl.css
+++ b/wp-content/themes/twentythirteen/rtl.css
@@ -261,19 +261,6 @@ div.nav-menu > ul {
 	margin-right: auto;
 }
 
-.blog .format-gallery .gallery-item,
-.archive .format-gallery .gallery-item,
-.search .format-gallery .gallery-item {
-	margin-left: 4px;
-	margin-right: auto;
-}
-.blog .format-gallery .gallery-item img,
-.archive .format-gallery .gallery-item img,
-.search .format-gallery .gallery-item img {
-	position: absolute;
-	left: 0;
-}
-
 .format-image .wp-caption-text {
 	text-align: right;
 }
@@ -726,7 +713,7 @@ div.nav-menu > ul {
 		padding-right: 0;
 	}
 
-	.single .gallery-columns-3 .gallery-item:nth-of-type(3n) {
+	.gallery-columns-3 .gallery-item:nth-of-type(3n) {
 		margin-left: 4px;
 		margin-right: auto;
 	}
@@ -738,12 +725,13 @@ div.nav-menu > ul {
 		margin-right: 0;
 	}
 
+	.gallery .gallery-item:nth-of-type(even) {
+		margin-left: 0;
+		margin-right: auto;
+	}
+
 	.gallery .gallery-item,
-	.single .gallery-columns-2.gallery-size-thumbnail .gallery-item,
-	.blog .format-gallery .gallery-item,
-	.archive .format-gallery .gallery-item,
-	.search .format-gallery .gallery-item,
-	.single .gallery.gallery-columns-3 .gallery-item:nth-of-type(even),
+	.gallery.gallery-columns-3 .gallery-item:nth-of-type(even),
 	.gallery-columns-3 .gallery-item:nth-of-type(3n),
 	.gallery-columns-5 .gallery-item:nth-of-type(5n),
 	.gallery-columns-7 .gallery-item:nth-of-type(7n),
@@ -752,14 +740,6 @@ div.nav-menu > ul {
 		margin-right: auto;
 	}
 
-	.blog .format-gallery .gallery-item:nth-of-type(odd),
-	.archive .format-gallery .gallery-item:nth-of-type(odd),
-	.search .format-gallery .gallery-item:nth-of-type(odd),
-	.single .gallery .gallery-item:nth-of-type(even) {
-		margin-left: 0;
-		margin-right: auto;
-	}
-
 	.comment-author .avatar {
 		margin-left: 5px;
 		margin-right: auto;
diff --git a/wp-content/themes/twentythirteen/style.css b/wp-content/themes/twentythirteen/style.css
index e0e3a3f248..156ea78b83 100644
--- a/wp-content/themes/twentythirteen/style.css
+++ b/wp-content/themes/twentythirteen/style.css
@@ -1232,21 +1232,9 @@ footer.entry-meta {
 	margin: 0 auto 20px;
 }
 
-.gallery-columns-1 .gallery-item {
-	max-width: 100%;
-}
-
-.gallery-columns-2 .gallery-item {
-	max-width: 48%;
-	max-width: -webkit-calc(50% - 4px);
-	max-width:         calc(50% - 4px);
-	text-align: center;
-}
-
+.gallery-columns-1 .gallery-item,
+.gallery-columns-2 .gallery-item,
 .gallery-columns-3 .gallery-item {
-	max-width: 31%;
-	max-width: -webkit-calc(33.3% - 4px);
-	max-width:         calc(33.3% - 4px);
 	text-align: center;
 }
 
@@ -1481,89 +1469,6 @@ footer.entry-meta {
 	color: #722d19;
 }
 
-/* Blog gallery */
-.blog .format-gallery .gallery,
-.archive .format-gallery .gallery,
-.search .format-gallery .gallery {
-	margin-bottom: 20px;
-	margin-left: -4px;
-	max-width: 608px;
-}
-
-.blog .format-gallery .gallery-item,
-.archive .format-gallery .gallery-item,
-.search .format-gallery .gallery-item {
-	display: block;
-	height: 148px;
-	margin-right: 4px;
-	max-height: 100%;
-	max-width: 100%;
-	overflow: hidden;
-	width: 148px;
-}
-
-.blog .format-gallery .gallery-item img,
-.archive .format-gallery .gallery-item img,
-.search .format-gallery .gallery-item img {
-	height: 100%;
-	max-height: 148px;
-	max-width: none;
-	width: auto;
-}
-
-.blog .format-gallery .gallery-item .portrait img,
-.archive .format-gallery .gallery-item .portrait img,
-.search .format-gallery .gallery-item .portrait img {
-	height: auto;
-	max-height: none;
-	max-width: 148px;
-	width: 100%;
-}
-
-.blog .format-gallery .gallery-item:first-child,
-.archive .format-gallery .gallery-item:first-child,
-.search .format-gallery .gallery-item:first-child {
-	height: 300px;
-	width: 300px;
-}
-
-.blog .format-gallery .gallery-item:first-child img,
-.archive .format-gallery .gallery-item:first-child img,
-.search .format-gallery .gallery-item:first-child img {
-	max-height: 300px;
-}
-
-.blog .format-gallery .gallery-item:first-child .portrait img,
-.archive .format-gallery .gallery-item:first-child .portrait img,
-.search .format-gallery .gallery-item:first-child .portrait img {
-	max-height: none;
-	max-width: 300px;
-}
-
-.blog .format-gallery .gallery-item .gallery-icon,
-.archive .format-gallery .gallery-item .gallery-icon,
-.search .format-gallery .gallery-item .gallery-icon {
-	height: 100%;
-	-webkit-transform: translate(50%, 50%);
-	-ms-transform:     translate(50%, 50%);
-	transform:         translate(50%, 50%);
-	width: 100%;
-}
-
-.blog .format-gallery .gallery-item .gallery-icon img,
-.archive .format-gallery .gallery-item .gallery-icon img,
-.search .format-gallery .gallery-item .gallery-icon img {
-	-webkit-transform: translate(-50%, -50%);
-	-ms-transform:     translate(-50%, -50%);
-	transform:         translate(-50%, -50%);
-}
-
-.blog .format-gallery .gallery br,
-.archive .format-gallery .gallery br,
-.search .format-gallery .gallery br {
-	display: none;
-}
-
 /* Image */
 .format-image .entry-title {
 	font-size: 28px;
@@ -3012,29 +2917,23 @@ footer.entry-meta {
 	}
 
 	.gallery .gallery-item,
-	.single .gallery-columns-2.gallery-size-thumbnail .gallery-item,
-	.blog .format-gallery .gallery-item,
-	.archive .format-gallery .gallery-item,
-	.search .format-gallery .gallery-item {
+	.gallery-columns-2.gallery-size-thumbnail .gallery-item {
 		max-width: none;
 		width: 49%;
 		width: -webkit-calc(50% - 4px);
 		width:         calc(50% - 4px);
 	}
 
-	.single .gallery-columns-1.gallery-size-medium,
-	.single .gallery-columns-1.gallery-size-thumbnail,
-	.single .gallery-columns-2.gallery-size-thumbnail,
-	.single .gallery-columns-3.gallery-size-thumbnail {
+	.gallery-columns-1.gallery-size-medium,
+	.gallery-columns-1.gallery-size-thumbnail,
+	.gallery-columns-2.gallery-size-thumbnail,
+	.gallery-columns-3.gallery-size-thumbnail {
 		display: block;
 	}
 
 	.gallery-columns-1 .gallery-item,
-	.single .gallery-columns-1.gallery-size-medium .gallery-item,
-	.single .gallery-columns-1.gallery-size-thumbnail .gallery-item,
-	.blog .format-gallery .gallery-item:first-child,
-	.archive .format-gallery .gallery-item:first-child,
-	.search .format-gallery .gallery-item:first-child {
+	.gallery-columns-1.gallery-size-medium .gallery-item,
+	.gallery-columns-1.gallery-size-thumbnail .gallery-item {
 		text-align: center;
 		width: 98%;
 		width: -webkit-calc(100% - 4px);
@@ -3052,10 +2951,7 @@ footer.entry-meta {
 		display: none;
 	}
 
-	.blog .format-gallery .gallery-item:nth-of-type(odd),
-	.archive .format-gallery .gallery-item:nth-of-type(odd),
-	.search .format-gallery .gallery-item:nth-of-type(odd),
-	.single .gallery .gallery-item:nth-of-type(even) {
+	.gallery .gallery-item:nth-of-type(even) {
 		margin-right: 0;
 	}