Fortress Mamai-Calais - Roman-Byzantine building, which is located in the neighborhood Mamayka, in the mouth Psakhe. The exact date of construction of the fortress, unfortunately, still unknown. However, it is believed that it was erected in about 1-4 century ad Original fortification was called Majora.

The main purpose with which the fortress was built Mamai-Calais, was the protection of local trading posts from the attack of pirates and nomads. After some time outside the city walls built market square, where the merchants had the opportunity to calmly deal with the exchange and sale of its product without fear of any robberies. Gradually the average strength began to develop and became the Grand Bazaar, what was the cause of its destruction.

Archaeological excavations of the fortress Mamai-Calais began in 1820, but in 1886 all the work that was carried out with undefined frequency, stopped altogether. And only in 1957, on the ruins of a fortress again drew attention. The expedition was conducted under the leadership of N. In. Anfimova and consisted of employees of the Sochi history Museum.

Due to the lack of supervision of the walls is almost completely collapsed. Survived only two wall curtains and partly another. Today the fortress Mamai-Calais research continues, however, from the fortifications in ruins, which, in spite of that, they attract a large number of tourists.