Home of the Radziwiłłs for four centuries, and the Radziwiłłs outspent the kings of Poland: it shows in the twelve state rooms, each with its own colour and style, and in the Italian-style bastions built to protect a palace rather than a garrison. A hundred hectares of nineteenth-century parkland surround it, with lakes and avenues. Minutes away, the Corpus Christi church — the first Baroque building raised outside Italy — holds the family crypt.