Opening image: the Hagia Sophia is an architectural marvel. / It was originally a basilica, then a mosque, then a museum and then recently a mosque again. / My favourite time to visit is early evening. The light pink exterior looks magical as the sun begins to set, causing it to glow brightly in Sultanahmet Square. / The building is one of the most significant surviving examples of Byzantine architecture. / A visit to The Grand Bazaar is a must. With 4,000 shops and more than 60 streets and alleys, there’s a lot to choose from, including Turkish tea sets.