diff --git a/app/map_styles/polygon.xml b/app/map_styles/polygon.xml
index d90205d5..20bb9c0c 100644
--- a/app/map_styles/polygon.xml
+++ b/app/map_styles/polygon.xml
@@ -1028,13 +1028,9 @@
             <PolygonSymbolizer fill="#00B2CB" />
         </Rule>
         <Rule>
-            <Filter>[typology_style_period] = "Early Medieval (410-1066)"</Filter>
+            <Filter>[typology_style_period] = "Medieval (410-1485)"</Filter>
             <PolygonSymbolizer fill="#00A9C6" />
         </Rule>
-        <Rule>
-            <Filter>[typology_style_period] = "Mid-Late Medieval (1066-1485)"</Filter>
-            <PolygonSymbolizer fill="#00A0C1" />
-        </Rule>
         <Rule>
             <Filter>[typology_style_period] = "Tudor (1485-1603)"</Filter>
             <PolygonSymbolizer fill="#0097BC" />
@@ -1044,7 +1040,7 @@
             <PolygonSymbolizer fill="#008EB7" />
         </Rule>
         <Rule>
-            <Filter>[typology_style_period] = "Georgian/William IV (1714-1837)"</Filter>
+            <Filter>[typology_style_period] = "Georgian (1714-1837)"</Filter>
             <PolygonSymbolizer fill="#0085B2" />
         </Rule>
         <Rule>
@@ -1056,17 +1052,9 @@
             <PolygonSymbolizer fill="#0073A8" />
         </Rule>
         <Rule>
-            <Filter>[typology_style_period] = "World War I (1914-18)"</Filter>
+            <Filter>[typology_style_period] = "WWI - WWII (1914-45)"</Filter>
             <PolygonSymbolizer fill="#006AA3" />
         </Rule>
-        <Rule>
-            <Filter>[typology_style_period] = "Interwar (1918-39)"</Filter>
-            <PolygonSymbolizer fill="#00619E" />
-        </Rule>
-        <Rule>
-            <Filter>[typology_style_period] = "World War II (1939-45)"</Filter>
-            <PolygonSymbolizer fill="#005899" />
-        </Rule>
         <Rule>
             <Filter>[typology_style_period] = "Post war (1945-1975)"</Filter>
             <PolygonSymbolizer fill="#004F94" />
@@ -1080,13 +1068,9 @@
             <PolygonSymbolizer fill="#003D8A" />
         </Rule>
         <Rule>
-            <Filter>[typology_style_period] = "2000s/2010s"</Filter>
+            <Filter>[typology_style_period] = "2000s"</Filter>
             <PolygonSymbolizer fill="#003485" />
         </Rule>
-        <Rule>
-            <Filter>[typology_style_period] = "2020s"</Filter>
-            <PolygonSymbolizer fill="#002C7C" />
-        </Rule>
 
         <Rule>
             <MaxScaleDenominator>17061</MaxScaleDenominator>
diff --git a/app/src/frontend/config/category-maps-config.ts b/app/src/frontend/config/category-maps-config.ts
index d9d575dd..19815c58 100644
--- a/app/src/frontend/config/category-maps-config.ts
+++ b/app/src/frontend/config/category-maps-config.ts
@@ -323,21 +323,17 @@ export const categoryMapsConfig: {[key in Category]: CategoryMapDefinition[]} =
                 title: 'Architectural style',
                 elements: [
                     { color: '#00B2CB', text: 'Roman (43AD-410)' },
-                    { color: '#00A9C6', text: 'Early Medieval (410-1066)' },
-                    { color: '#00A0C1', text: 'Mid-Late Medieval (1066-1485)' },
+                    { color: '#00A9C6', text: 'Medieval (410-1485)' },
                     { color: '#0097BC', text: 'Tudor (1485-1603)' },
                     { color: '#008EB7', text: 'Stuart (1603 -1714)' },
-                    { color: '#0085B2', text: 'Georgian/William IV (1714-1837)' },
+                    { color: '#0085B2', text: 'Georgian (1714-1837)' },
                     { color: '#007CAD', text: 'Victorian (1837-1901)' },
                     { color: '#0073A8', text: 'Edwardian (1901-1914)' },
-                    { color: '#006AA3', text: 'World War I (1914-18)' },
-                    { color: '#00619E', text: 'Interwar (1918-39)' },
-                    { color: '#005899', text: 'World War II (1939-45)' },
+                    { color: '#006AA3', text: 'WWI - WWII (1914-45)' },
                     { color: '#004F94', text: 'Post war (1945-1975)' },
                     { color: '#00468F', text: 'Postmodern (1975-1990)' },
                     { color: '#003D8A', text: '1990s' },
-                    { color: '#003485', text: '2000s/2010s' },
-                    { color: '#002C7C', text: '2020s' },
+                    { color: '#003485', text: '2000s' },
                 ]
             }
         },
diff --git a/app/src/frontend/config/data-fields-config.ts b/app/src/frontend/config/data-fields-config.ts
index d90e16ce..91ddb459 100644
--- a/app/src/frontend/config/data-fields-config.ts
+++ b/app/src/frontend/config/data-fields-config.ts
@@ -1501,21 +1501,17 @@ export const dataFields = { /* eslint-disable @typescript-eslint/camelcase */
         example: "High rise: Not part of a group/cluster",
         items: [
             'Roman (43AD-410)',
-            'Early Medieval (410-1066)',
-            'Mid-Late Medieval (1066-1485)',
+            'Medieval (410-1485)',
             'Tudor (1485-1603)',
             'Stuart (1603 -1714)',
-            'Georgian/William IV (1714-1837)',
+            'Georgian (1714-1837)',
             'Victorian (1837-1901)',
             'Edwardian (1901-1914)',
-            'World War I (1914-18)',
-            'Interwar (1918-39)',
-            'World War II (1939-45)',
+            'WWI - WWII (1914-45)',,
             'Post war (1945-1975)',
             'Postmodern (1975-1990)',
             '1990s',
-            '2000s/2010s',
-            '2020s',
+            '2000s',
         ]
     },
     typology_style_period_source_type: {