David Stanley has authored numerous travel guidebooks for Lonely Planet and Moon Handbooks. He has seen every country in the world and visited all but one.
The 57-meter Column of Constantine (330 AD) near the Grand Bazaar in Istanbul, Turkey, originally stood in the Temple of Apollo in Rome. It is also called Cemberlitas (column with rings) for the iron support rings added after a 17th century fire.
Four massive "elephant's feet" pillars support the weight of the dome above the Blue Mosque (1617) in Istanbul, Turkey. The mosque's 260 windows provide excellent lighting.
The 17th century Sultan Ahmet Mosque in Istanbul, Turkey, is also known as the Blue Mosque for the thousands of blue Iznic tiles which cover much of the interior.