The oldest churches in the city centre, the Ascension and St Dimitri churches, were built in the 18th century, after the 1689 Great Fire. They were both renovated in the 19th century. The Church of the Ascension is particularly small it is half-buried in order not to overlook neighbouring mosques. In the 19th century, several new churches were built, including the Church of the Nativity of the Virgin Mary, which is a large three-nave building designed by Andrey Damyanov.