diff --git a/chasemapper/config.py b/chasemapper/config.py
index cd802ba..f1bdf7d 100644
--- a/chasemapper/config.py
+++ b/chasemapper/config.py
@@ -23,6 +23,7 @@ default_config = {
     "default_alt": 0,
     "payload_max_age": 180,
     "thunderforest_api_key": "none",
+    "stadia_api_key": "none",
     # Predictor settings
     "pred_enabled": True,  # Enable running and display of predicted flight paths.
     "offline_predictions": False,  # Use an offline GFS model and predictor instead of Tawhiri.
@@ -163,6 +164,12 @@ def parse_config_file(filename):
         logging.info("Missing default_alt setting, using default (0m)")
         chase_config["default_alt"] = 0
 
+    try:
+        chase_config["stadia_api_key"] = config.get("map", "stadia_api_key")
+    except:
+        logging.info("Missing Stadia API Key setting, using default (none)")
+        chase_config["stadia_api_key"] = "none"
+
     # Telemetry Source Profiles
 
     _profile_count = config.getint("profile_selection", "profile_count")
diff --git a/horusmapper.cfg.example b/horusmapper.cfg.example
index 019754b..874d332 100644
--- a/horusmapper.cfg.example
+++ b/horusmapper.cfg.example
@@ -108,6 +108,11 @@ payload_max_age = 180
 # Once you have a key, enter it below:
 thunderforest_api_key = none
 
+# Stadia Maps API Key
+# Stadia provides an excellent Dark map layer (Alidade Smooth Dark), which is looking promising for use in a 'dark mode' theme.
+# Accessing this requires registering at https://client.stadiamaps.com/signup/ then creating a 'property'
+# and obtaining an API key. Once you have a key, enter it below:
+stadia_api_key = none
 
 # Predictor Settings
 # By default this will attempt to get predictions from the online Tawhiri Predictions API.
diff --git a/templates/index.html b/templates/index.html
index 100b4a0..fef7214 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -240,6 +240,7 @@
                 attribution: '© '+esrimapLink+', '+esriwholink,
                 maxZoom: 18,
             });
+            // Dark Matter map layer, one of the maps suitable for 'dark mode'
             var dark_matter_map = L.tileLayer('https://{s}.basemaps.cartocdn.com/rastertiles/dark_all/{z}/{x}/{y}.png', {
                 attribution: '&copy; <a href="https://carto.com/help/building-maps/basemap-list/">Carto</a>'
             });
@@ -259,6 +260,16 @@
 
             }
 
+            if (chase_config.stadia_api_key !== 'none'){
+                // Stadia Alidade Smooth Dark Layer.
+                var alidade_smooth_dark = L.tileLayer('https://tiles.stadiamaps.com/tiles/alidade_smooth_dark/{z}/{x}/{y}{r}.png?apikey='+chase_config.stadia_api_key, 
+                {
+                    attribution: '&copy; <a href="https://stadiamaps.com/">Stadia Maps</a>, &copy; <a href="https://openmaptiles.org/">OpenMapTiles</a> &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors'
+                });
+                map_layers['Alidade Smooth Dark'] = alidade_smooth_dark;
+
+            }
+
             // Add Offline map layers, if we have any.
             for (var i = 0, len = chase_config.offline_tile_layers.length; i < len; i++) {
                 var _layer_name = chase_config.offline_tile_layers[i];