Altffenser

Hi guys, I'm new to the forum but not in the game and that is why I felt that something was missing ... And the truth is that there are many changes from the immediate previous version to the recent one. Playing with the Spartans (my favorite civilization: D) I realize that the Stoa building no longer exists. Could someone tell me why the reason for disappearing it? I loved the variety of units on that Civ. Thanks!