Brno is the second largest city in Czech Republic and home of biggest tech hub in the Czech Republic. Above the old city, Brno Cathedral with an exquisite Baroque interior and a crypt, with old tombs and ruins of the original city walls. Brno is also home to the Villa Tugendhat, an architecture masterpice by Ludwig Mies van de Rohe. The document that dissolved the Czechoslovakia was signed in Villa Tugendhat.