Five red-brick towers picked out in pale stone, set square around a courtyard: Baltic Gothic meeting Italian Renaissance, and the result looks like nothing else. Begun by the Ilyinich family in the early sixteenth century and finished by the Radziwiłłs, it survived Napoleon, two wars, and use as a ghetto in 1942. The interior is now a museum, and the English park and the pond that mirrors the walls survive with it.