The Estates Theatre in Prague is one of Europe's oldest. Sitting in the heart of Prague’s old town, it’s a long building, with a towering façade held up by Corinthian columns. Today it hosts theater, opera and ballet. But it’s been operating since 1783. “There are only two theaters in Europe that have been operating like this,” said Marketa Halirova, a singer and music teacher. “One is in Austria and the other is here in Prague.” Halirova spent some time at the Estates with KNKX travel expert