There are many beautiful historical monuments in Jesi, in its medieval appearance surrounded by high walls on which stands the Donjon of Montirozzo (15th century), symbol of the city; the Duomo of San Septimius (12th-14th century) and the Gothic church of San Marco (' 200), the Palazzo of Podestà and the Palazzo del Comune (12th century), the Palazzo della Signoria repeated (half of the 15th) and Rococo art masterpieces as Palazzo Pianetti (mid 1700s) which today is the residence of the town art gallery that preserves masterpieces of Venetian painter Lorenzo Lotto, that here he worked in the second half of the 15th century.
Significant example of 18th century aristocratic mansion was designed by Domenico Luigi Valeri and is inspired in part by Austro-Bavarian models. The main floor has a gallery Rococo to coloured stucco and rooms decorated by Placido Lazzarini with stories of Enea. In the ancient art collection, which includes the works of religious congregations were suppressed in 1867, are the paintings by Lorenzo Lotto for churches and confraternities of Jesi, from juvenile Deposition (1512) to works of maturity as the Madonna with child and saints Joseph and Girolamo (1526) and the monumental altarpiece with the histories of St. Lucia (1532).
Also important are the works of Nicola di Maestro Antonio from Ancona (Christ died in sarcophagus supported by two Angels), Giuliano Presutti, Pietro Paolo Agabiti (Madonna with child enthroned and Saints John the Baptist and Antonio da Padova), raffaellino del Colle (Madonna di Loreto between SS. Filippo and Gacomo) and the canvas of Cristoforo Roncalli said Pomarancio, the Holy family with St. John.