One of Renaissance Rimini's most prestigious mansions, but still in ruins after being destroyed during bomb attacks on the city in the Second World War.

Built in the early 1500's by Carlo Maschi, who occupied a variety of public positions, the four-story mansion was inherited by the Marcheselli family. The decoration of the reception room on the first floor was commissioned by Carlo, and it was carried out in 1570 by Marco Marchetti from Faenza, famous for his work at Florence's Palazzo Vecchio. The decorations portrayed Scipio Africanus Major's deeds in the Second Punic War, and some of the ceiling panels, saved from destruction, are now in the Civic Museum.

The mansion, visited by English monarchs and Queen Christina of Sweden, came into the possession of the Lettimi family in 1770. Andrea Lettimi, the new owner, restored the building and raised it one storey, also linking it to the adjacent residence. In 1902 it was bequeathed to Rimini City Council, on condition that the Civic Music School would be entitled for Giovanni Lettimi.

The remains of the 16th-century mansion include the ashlar-work door arch, in which the heraldic symbols of the four-petal rose of the Malatesta and the Bentivoglio diamond are united, perhaps to honour a marriage between the two families to whom Carlo Maschi was close. Among the other original elements is the characteristic scarp wall linked to the upper part of the main wall by a stone beading, and the stone-framed windows, surmounted by the arms of the Maschi family and a pair of dolphins.