Located in the southwest corner of Brasov, the Weavers' Bastion, occupies an area of 1,616 square meters. Its walls have a thickness between 4 m at the base and 1 m at the fourth level of the building. Built by the weavers' guild, on four levels, with gaps, oil holes and two watchtowers, the bastion has a unique architecture in south-eastern Europe. Being spared by the great fire of 1689, it is preserved in its original form. The first construction works took place between 1421 and 1436, the first two levels being raised. In 1522 it was documented. Between 1570 and 1573 the third floor was built, and between 1750 and 1910 important restoration works were carried out, after the bastion had partially collapsed in 1701. In 1908, after serving for a long time only as a warehouse, the bastion it has acquired the adjacent building (the headquarters of the guild), and, more and more, it is used for parties and especially opera concerts, due to the extraordinary acoustic qualities it shows. In 1950, inside the bastion, the Bârsa Country Museum was arranged, in which the model of the old fortress of Brașov and Șcheiu is exhibited, as it looked at the end of the 17th century, as well as weapons and products of the weavers' guild.