“ JESI (anc. Aesis) , a town and episcopal see of the Marches, Italy, in the province of Ancona, from which it is 17 m. W. by S. by rail, 318 ft. above sea-level. Pop. (1901) , 23,285. The place took its ancient name from the river Aesis (mod. Esino) , upon the left bank of which it lies. It still retains its picturesque medieval town walls. The Palazzo del Comune is a fine, simple, early Renaissance building (1487–1503) by Francesco di Giorgio Martini; the walls are of brick and the window and door-frames of stone, with severely restrained ornamentation. ”