Estonia, Tallinn, Orthodox Cathedral of Alexander Nevsky, Toompea.

Estonia, Tallinn, Orthodox Cathedral of Alexander Nevsky, Toompea.

Estonia, Tallinn, Orthodox Cathedral of Alexander Nevsky, Toompea.

Russia, St Petersburg, Church on Spilled Blood, also Church of the Saviour on Spilled Blood.

Italy, Tuscany, Florence, Florence Cathedral, Cattedrale Di Santa Maria Del Fiore, Piazza Del Duomo.

Italy, Tuscany, Florence, Florence Cathedral, Cattedrale Di Santa Maria Del Fiore, Giottos tower.

Greece, Chios, The Turkish Baths.

Uzbekistan, Samarkand, A dome of Bibi Khanym Mosque, also known as Bibi Khanum Mosque.

Uzbekistan, Samarkand, A dome of Sher Dor Madrasah, also known as Shir Dor Madrasah, Registan Square.

Uzbekistan, Bukhara, Chor Minor Madrasah, also known as Chor Minar Madrasah.

Uzbekistan, Bukhara, Domed roof of Toqi Zargaron, also known as Toki Zargaron, jewellers trading market.

Uzbekistan, Bukhara, A dome of Mir I Arab Madrasah, Poi Kalon.