The old town, called Vanalinn by the Estonians, is the heart of the Estonian capital, Tallinn. Its uniqueness can be seen, among others, in the medieval walls built in the thirteenth century that have survived in its entirety to the present day. The walls are currently the longest-preserved fortifications of this type in Europe. However, is not the only attraction that the Baltic city offers as behind the walls there are cobbled streets, along which the old merchant and craft houses stand, as well as beautiful churches of various denominations. There are Catholic, Protestant and Orthodox temples, including Alexander Nevsky Cathedral.