A mosque and street in the Scutari district of Constantinople, in a fascinating image which gives an impression of day-to-day life during the latter years of the Ottoman Empire

The neighbourhood of Galata, opposite Constantinople, located on the northern shore of the Golden Horn, the inlet which separates it from the historic peninsula of old Constantinople

A stunning view of Fenerbahce on the sea of Marmara in Constantinople, Turkey, between 1890 and 1900, during the final years of the Ottoman Empire

Hundreds of people walk across the Galata bridge in Constantinople, as small boats sail across the water on what was a major trade route into Europe during the Ottoman Empire

Prior to the fall of the Ottoman Empire, Constantinople, on the banks of the Bosphorus, was the largest and wealthiest city in Europe

The Pertevniyal Valide Sultan Camii, Aksaray, in Constantinople, during the final years of the Ottoman Empire

Constantinople′s landmark burnt column

Sultan’s Bajazid mosque in Constantinople, Turkey, is one of the landmarks revealed in this stunning set of images

Colour has been added to the postcards using a process called Photochrom, bringing the historic city to life

A view from the bridge in Constantinople, where Europe meets Asia, in a scene which gives a fascinating insight into life at the close of the 19th century

Before it was renamed Istanbul in 1930, Constantinople was the Turkish capital and integral to the empire as a hub of international trade routes

This coloured image shows the fountain of Sultan Ahmed, pictured in Constantinople in the 1890s, one of the city′s major landmarks

A shot of Constantinople′s Eyoub cemetery

The banks of the Bosporus during the latter years of the Ottoman Empire

An image of the Byzantine wall near Irdikale in Constantinople, painstakingly coloured following processing

A section of Eyoub cemetery in Constantinople, between 1890 and 1900

This photo taken in the 1890s of a man astride a mule with baskets in Top Capou, Constantinople, gives an impression of day-to-day life

A scene from Seraskerat in Constantinople: a young boy stands in the middle of the square as people go about their business in the largest and wealthiest city in Europe

A lively street in the district of Stamboul, taken between 1890 and 1900, which has been turned into a colour image

Colour was added to bring the image of the famous Yeni Cami mosque in modern-day Istanbul to life. It is pictured by moonlight as small boats row across the water

The landmark Yildirim Beyazit mosque in Bursa, Turkey, is among the postcard images which have been turned into a colour picture

This image of cypresses and the road leading to Scutari cemetery in Constantinople was taken between 1890 and 1900