The Tailors' Tower (Baba Novac Street / Stefan cel Mare Square) is part of the second fortified precinct of the walls system and of the fortifications of the city, built in the first half of 15th century and continued until the 17th century. It was built on the South-Eastern corner of the city defence wall, after 1405, following the privileges keyed by King Sigismund of Luxemburg. The first confirmed documents date 1457, from the time of King Matia Corvin.
The administration of the Tower was entrusted to the most powerful guilds of the town – the tailors' guild. Over time, the Tower was devastated several times (1551-1553, 1601, 1627, and 1707). The actual shape is given by the last big reconstruction from 1709-1711, made by the Austrians, out of over 150 stone wagons. The Tower has renewed again in 1956-1957 when they attempted the opening of a history museum of the city of Cluj, a project forbidden by the communist authorities in 1959.
http://www.visitclujnapoca.ro/en/atractii-turistice/monumente-si-complexe-arhitectonice/page/4/the-tailors-tower.html