diff --git a/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_city.png b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_city.png
new file mode 100644
index 0000000000..bc320a4a7a
--- /dev/null
+++ b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_city.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c92601e546e03c1c7005191c8b3ee3814d9cac93b5654e61393c95ebec0abfff
+size 119
diff --git a/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_hidden.png b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_hidden.png
new file mode 100644
index 0000000000..2b77a1c302
--- /dev/null
+++ b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_hidden.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5a70f0a373d594720c2982fc6253484235fb21f59ed1c5d901d7e88884ccb920
+size 1859
diff --git a/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_town.png b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_town.png
new file mode 100644
index 0000000000..0daa1a8347
--- /dev/null
+++ b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_town.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e64d9f57af4b29904500a9bbcf2240b04717ee8eee2bd993a49d0bbab5e5f393
+size 120
diff --git a/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_village.png b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_village.png
new file mode 100644
index 0000000000..5e5ed674dd
--- /dev/null
+++ b/binaries/data/mods/public/art/textures/ui/session/panel_phase_emblems_village.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0ca2e3c67b17f7d847166a832668a94ce8457aa51d5294a9e9dfb914dbad2baa
+size 132
diff --git a/binaries/data/mods/public/gui/session/selection_details.js b/binaries/data/mods/public/gui/session/selection_details.js
index 3dd0dbbaca..766009075e 100644
--- a/binaries/data/mods/public/gui/session/selection_details.js
+++ b/binaries/data/mods/public/gui/session/selection_details.js
@@ -317,9 +317,31 @@ function displaySingle(entState)
 		});
 	secondaryObject.hidden = hideSecondary;
 
-	let isGaia = playerState.civ == "gaia";
+	const isGaia = playerState.civ == "gaia";
 	Engine.GetGUIObjectByName("playerCivIcon").sprite = isGaia ? "" : "cropped:1.0, 0.15625 center:grayscale:" + civEmblem;
-	Engine.GetGUIObjectByName("civilizationTooltip").tooltip = isGaia ? "" : civName;
+
+	if (isGaia)
+	{
+		Engine.GetGUIObjectByName("phaseEmblems").sprite = "";
+		Engine.GetGUIObjectByName("civilizationTooltip").tooltip = "";
+	}
+	else
+	{
+		let civilizationTooltip = civName;
+		let civPhaseEmblems = "session/panel_phase_emblems_hidden.png";
+
+		// Reveal phases to mutual allies and observers
+		if (g_ViewedPlayer == -1 || playerState.isMutualAlly[g_ViewedPlayer])
+		{
+			const civPhase = g_SimState.players[entState.player].phase
+			civPhaseEmblems = "session/panel_phase_emblems_" + civPhase + ".png";
+			const civPhaseData = GetTechnologyData("phase_" + civPhase + "_" + playerState.civ, playerState.civ) ||
+				GetTechnologyData("phase_" + civPhase, playerState.civ);
+			civilizationTooltip += " — " + getEntityNames(civPhaseData);
+		}
+		Engine.GetGUIObjectByName("phaseEmblems").sprite = "cropped:1.0, 1.0 center:" + civPhaseEmblems;
+		Engine.GetGUIObjectByName("civilizationTooltip").tooltip = civilizationTooltip;
+	}
 
 	// TODO: we should require all entities to have icons
 	Engine.GetGUIObjectByName("icon").sprite = template.icon ? ("stretched:session/portraits/" + template.icon) : "BackgroundBlack";
diff --git a/binaries/data/mods/public/gui/session/selection_panels_middle/single_details_area.xml b/binaries/data/mods/public/gui/session/selection_panels_middle/single_details_area.xml
index 1543965c3a..ff55736a2a 100644
--- a/binaries/data/mods/public/gui/session/selection_panels_middle/single_details_area.xml
+++ b/binaries/data/mods/public/gui/session/selection_panels_middle/single_details_area.xml
@@ -12,6 +12,8 @@
 			<object size="50%-64 50%-10 50%+64 50%+10" name="playerCivIcon" type="image" ghost="true"/>
 			<!-- Player color band. -->
 			<object name="playerColorBackground" type="image" sprite="playerColorBackground" ghost="true"/>
+			<!-- Phase emblems. -->
+			<object size="0 0 100% 100%" name="phaseEmblems" type="image" ghost="true"/>
 			<object type="image" sprite="bottomEdgedPanelShader" ghost="true"/>
 			<!-- Player name. -->
 			<object size="0 50%-10 100% 50%+10" name="player" type="text" style="largeCenteredOutlinedText"/>