He made Raphael custodian of the classical antiquities of Rome and the vicinity.
There are several fine public buildings, as the governor's palace, the new opera-house, the public library and museum of Maltese antiquities, and the auberges or lodges of the Knights of Malta (especially the Auberge de Castile) which are now used for military offices, club-rooms, and other purposes.
There are a theatre, an interesting museum of antiquities, natural history and art; and a picturesque park (Bjergsted).
The palace contains a picture gallery and collections of natural history and antiquities, and in front of it are two monumental fountains and a monument to the emperor William I.
There is an archaeological museum with prehistoric antiquities from the lake-dwellings on an island in the Lake of Varese.