When The biggest cathedral in the world, the Hagia Sophia is considered the magnum opus of Byzantine architecture. Readers say This is a have to-see when in Istanbul and recommend taking a guided tour For more info concerning the history of the site. Getting an Istanbulkart is a good idea https://wordpress-kursu-istanbul46789.blogdanica.com/36778380/wordpress-installieren-no-further-a-mystery