Romania, Constanta, Round window on front of Saint Peter and Saint Paul the Apostles Cathedral.

Bulgaria, Nessebar, Saint John Aliturgetos Church.

Bulgaria, Nessebar, Saint John Aliturgetos Church.

Bulgaria, Nessebar, Hagia Sophia Basilica, also known as St Sophia Church and The Old Bishopric.

Bulgaria, Nessebar, Christ Pantocrator Church.

Bulgaria, Nessebar, Christ Pantocrator Church.

Bulgaria, Nessebar, Arch and walls, Hagia Sophia Basilica, also known as St Sophia Church and The Old Bishopric.

USA, Massachusetts, Boston, East facade of Old State House, State Street.

USA, Massachusetts, Boston, Old State House, State Street.

USA, Massachusetts, Boston, Old State House, State Street.

USA, Massachusetts, Boston, Pierce Hichborn House, North Square, North End.

Uzbekistan, Samarkand, Bibi Khanym Mosque, also known as Bibi Khanum Mosque.