Kazan Kreml, Russia (UNESCO)

This beautiful postcard sent by Irina shows the Kazan Kremlin, built by command of Ivan the Terrible on the ruins of the castle of the Kazan Khans. It is the chief historic castle of Tartastan. It includes several buildings, one of them the Annunciation Chapel.
The Kazan Kremlin was declared a UNESCO World Heritage Site in 2000.