Istanbul, that magnificent city straddling two continents, has been the subject of countless photographers and painters throughout history. One of its most wonderful portrayers was the Russian painter of Armenian origin, Ivan Aivazovsky. One of the most celebrated Russian painters of the 19th century, he&rsquos still regarded as one of the doyens of the Romantic school of painting. His specialisa­tion was in marine scenes. In fact, for a while, he travelled with the Russian Emperor Nikolai I to participate in and paint naval manoeuvres.