The document discusses several landmarks from around the world. It mentions that Hagia Sophia in Istanbul was originally built as an Orthodox Christian church in the 4th century before becoming a museum in 1935. It also describes the Colosseum in Rome as an enormous arena built in the 1st century where gladiators fought and violent sports were watched by 55,000 spectators, with the floor sometimes being flooded. Finally, it states that Batumi is a popular seaside resort town located on the west coast of Georgia.