Baseball Open

What is the large open area when you enter a baseball stadium called?

I'm looking for an architectural term here. I'm specifically thinking of the minor-league park I went to in Salt Lake City that had one of these right when you came through the gate. I think it might be "atrium" but I'm not sure if that applies to an open-air area.

In Citi Field its called a rotunda, the Jackie Robinson Rotunda, it was also called a rotunda in Ebbets Field, thats twhat this was named for.

In Shea Stadium, they called it a lobby.

1978 TOPPS CELLO BASEBALL CARD PACK RIP OPEN AND BOX COLLECTION - MODERN AND VINTAGE COLLECTION