Index: binaries/data/mods/public/gui/civinfo/civinfo.js
===================================================================
--- binaries/data/mods/public/gui/civinfo/civinfo.js
+++ binaries/data/mods/public/gui/civinfo/civinfo.js
@@ -3,17 +3,29 @@
  */
 const g_CivData = loadCivData(true, false);
 
+/*
+ * Callback function on closing gui via Engine.PopGuiPage().
+ */
+var g_Callback = "";
+
 /**
  * Initialize the dropdown containing all the available civs.
  */
-function init(settings)
+function init(data)
 {
+	if (data && data.callback)
+	{
+		g_CallbackSet = true;
+		g_Callback = data.callback;
+	}
+
 	var civList = Object.keys(g_CivData).map(civ => ({ "name": g_CivData[civ].Name, "code": civ })).sort(sortNameIgnoreCase);
 	var civSelection = Engine.GetGUIObjectByName("civSelection");
 
 	civSelection.list = civList.map(civ => civ.name);
 	civSelection.list_data = civList.map(civ => civ.code);
-	civSelection.selected = 0;
+	g_SelectedCiv = data !== undefined && data.civ ? data.civ : "";
+	civSelection.selected = g_SelectedCiv ? civSelection.list_data.indexOf(g_SelectedCiv) : 0;
 }
 
 /**
@@ -79,6 +91,12 @@
 	return coloredText(string + "\n", "white");
 }
 
+function switchToStrucTreePage()
+{
+	Engine.PopGuiPage();
+	Engine.PushGuiPage("page_structree.xml", { "civ": g_SelectedCiv, "callback": g_Callback });
+}
+
 /**
  * Updates the GUI after the user selected a civ from dropdown.
  *
@@ -88,6 +106,8 @@
 {
 	var civInfo = g_CivData[code];
 
+	g_SelectedCiv = code;
+
 	if(!civInfo)
 		error(sprintf("Error loading civ data for \"%(code)s\"", { "code": code }));
 
Index: binaries/data/mods/public/gui/civinfo/civinfo.xml
===================================================================
--- binaries/data/mods/public/gui/civinfo/civinfo.xml
+++ binaries/data/mods/public/gui/civinfo/civinfo.xml
@@ -4,6 +4,7 @@
 
 	<script directory="gui/common/"/>
 	<script directory="gui/civinfo/"/>
+	<script file="gui/reference/common/core.js"/>
 
 	<!-- Add a translucent black background to fade out the menu page -->
 	<object type="image" z="0" sprite="BackgroundTranslucent"/>
@@ -117,11 +118,20 @@
 			<translatableAttribute id="caption">Close</translatableAttribute>
 			<action on="Press">
 				<![CDATA[
-					Engine.PopGuiPage();
+					closePage({ "civ": g_SelectedCiv, "page": "page_civinfo.xml" });
 				]]>
 			</action>
 		</object>
 
+		<object
+			type="button"
+			style="StoneButton"
+			size="100%-309 100%-52 100%-169 100%-24"
+		>
+			<translatableAttribute id="caption">Structure Tree</translatableAttribute>
+			<action on="Press">switchToStrucTreePage();</action>
+		</object>
+
 	</object>
 
 </objects>
Index: binaries/data/mods/public/gui/gamesetup/gamesetup.js
===================================================================
--- binaries/data/mods/public/gui/gamesetup/gamesetup.js
+++ binaries/data/mods/public/gui/gamesetup/gamesetup.js
@@ -17,6 +17,19 @@
 const g_CivData = loadCivData(false, false);
 
 /**
+ * Store civilization code and page (structree or history) opened in civilization info.
+ */
+var g_CivInfo = {
+	"code": "",
+	"page": ""
+};
+
+/**
+ * Remember last civilization page opened  history or structure tree.
+ */
+var g_CivPage = "";
+
+/**
  * Highlight the "random" dropdownlist item.
  */
 var g_ColorRandom = "orange";
@@ -2446,3 +2459,9 @@
 
 	g_Autocomplete = Object.keys(autocomplete).sort().reverse().reduce((all, priority) => all.concat(autocomplete[priority]), []);
 }
+
+function storeCivInfoPage(data)
+{
+	g_CivInfo.code = data && data.civ ? data.civ : "";
+	g_CivInfo.page = data && data.page ? data.page : "";
+}
Index: binaries/data/mods/public/gui/gamesetup/gamesetup.xml
===================================================================
--- binaries/data/mods/public/gui/gamesetup/gamesetup.xml
+++ binaries/data/mods/public/gui/gamesetup/gamesetup.xml
@@ -59,7 +59,7 @@
 					>
 						<translatableAttribute id="tooltip">View civilization info</translatableAttribute>
 						<action on="Press"><![CDATA[
-							Engine.PushGuiPage("page_civinfo.xml");
+							Engine.PushGuiPage(g_CivInfo.page ? g_CivInfo.page : "page_civinfo.xml", { "civ": g_CivInfo.code, "callback": "storeCivInfoPage" });
 						]]></action>
 					</object>
 
Index: binaries/data/mods/public/gui/reference/common/core.js
===================================================================
--- binaries/data/mods/public/gui/reference/common/core.js
+++ binaries/data/mods/public/gui/reference/common/core.js
@@ -1,10 +1,10 @@
 var g_SelectedCiv = "";
 var g_CallbackSet = false;
 
-function closePage()
+function closePage(callbackData = 0)
 {
 	if (g_CallbackSet)
-		Engine.PopGuiPageCB(0);
+		Engine.PopGuiPageCB(callbackData);
 	else
 		Engine.PopGuiPage();
 }
Index: binaries/data/mods/public/gui/reference/structree/structree.js
===================================================================
--- binaries/data/mods/public/gui/reference/structree/structree.js
+++ binaries/data/mods/public/gui/reference/structree/structree.js
@@ -8,6 +8,11 @@
  */
 var g_TrainList = {};
 
+/*
+ * Callback function on closing gui via Engine.PopGuiPage().
+ */
+var g_Callback = "";
+
 /**
  * Initialize the page
  *
@@ -16,7 +21,10 @@
 function init(data = {})
 {
 	if (data.callback)
+	{
 		g_CallbackSet = true;
+		g_Callback = data.callback;
+	}
 
 	let civList = Object.keys(g_CivData).map(civ => ({
 		"name": g_CivData[civ].Name,
@@ -42,6 +50,12 @@
 	civSelection.selected = data.civ ? civSelection.list_data.indexOf(data.civ) : 0;
 }
 
+function switchToHistoryPage()
+{
+	Engine.PopGuiPage();
+	Engine.PushGuiPage("page_civinfo.xml", { "civ": g_SelectedCiv, "callback": g_Callback });
+}
+
 /**
  * @param {string} civCode
  */
Index: binaries/data/mods/public/gui/reference/structree/structree.xml
===================================================================
--- binaries/data/mods/public/gui/reference/structree/structree.xml
+++ binaries/data/mods/public/gui/reference/structree/structree.xml
@@ -109,7 +109,7 @@
 			</object>
 		</object>
 
-		<!-- Close dialog -->
+		<!-- History page -->
 		<object
 			type="button"
 			style="StoneButton"
@@ -117,7 +117,16 @@
 			hotkey="cancel"
 		>
 			<translatableAttribute id="caption">Close</translatableAttribute>
-			<action on="Press">closePage();</action>
+			<action on="Press">closePage({ "civ": g_SelectedCiv, "page": "page_structree.xml" });</action>
+		</object>
+		<!-- Close dialog -->
+		<object
+			type="button"
+			style="StoneButton"
+			size="100%-309 100%-44 100%-169 100%-16"
+		>
+			<translatableAttribute id="caption">History</translatableAttribute>
+			<action on="Press">switchToHistoryPage();</action>
 		</object>
 
 	</object>
Index: binaries/data/mods/public/gui/session/menu.js
===================================================================
--- binaries/data/mods/public/gui/session/menu.js
+++ binaries/data/mods/public/gui/session/menu.js
@@ -25,6 +25,11 @@
 // Shown in the trade dialog.
 var g_IdleTraderTextColor = "orange";
 
+/*
+ * Remembers last opened civilization info page either structure tree or history page for reopening.
+ */
+var g_CivInfoPage = "";
+
 /**
  * The barter constants should match with the simulation
  * Quantity of goods to sell per click.
@@ -1090,11 +1095,13 @@
 	closeOpenDialogs();
 	pauseGame();
 
-	// TODO add info about researched techs and unlocked entities
-	Engine.PushGuiPage("page_structree.xml", {
-		"civ": g_Players[g_ViewedPlayer].civ,
-		"callback": "resumeGame",
-	});
+	Engine.PushGuiPage(g_CivInfoPage ? g_CivInfoPage : "page_structree.xml", { "civ": g_Players[g_ViewedPlayer].civ, "callback": "storeCivInfoPage" });
+}
+
+function storeCivInfoPage(data)
+{
+	g_CivInfoPage = data !== undefined && data.page ? data.page : "";
+	resumeGame();
 }
 
 /**