The splendid Neoclassical cathedral or basilica is the country’s second largest church after Estergom. Painted the favourite Hungarian yellow, it is five minutes’ walk southwest from the main square, approached by a grand set of steps. Inside, it is cheerfully decorated with toffee-coloured columns and pastel frescoes. The Lyceum opposite the cathedral is worth visiting for its library. The observatory, at the top of the tower in the east wing of the Lyceum, houses a nineteenth-century camera obscura.