Following the tourist crowds downhill from Prague Castle via Ke Hradu will bring you to Nerudova, architecturally the most important street in Malá Strana; most of its old Renaissance façades were ‘baroquefied’ in the 18th century. (It’s named after the Czech poet Jan Neruda, who was famous for his short stories, Tales of Malá Strana.) From 1765 Josef of Bretfeld made his Bretfeld Palace a social hotspot, entertaining Mozart and Casanova.