(anc. Auximum, q.v.), a town and episcopal see of the Marches, Italy, in the province of Ancona, 10 m. S. of that town by rail. Pop. (1901) 6404 (town); 18,475 (commune). It is situated on the top of a hill 870 ft. above sea-level, whence there is a beautiful view, and it retains a portion of its ancient town wall (2nd century B.C.). The restored cathedral has a portal with sculptures of the 13th century, an old crypt, a fine bronze font of the 16th century and a series of portraits of all the bishops of the see; the town hall contains a number of statues found on the site of the ancient forum and also a few good pictures. The castle (1489) was built by Baccio Pontelli. Silk-spinning and the raising of cocoons are carried on.