Rising on the northern side of the beautiful Piazza del Gesù Nuovo, the church was originally a sumptuous palace. It was built in 1470 for Roberto Sanseverino, prince of Salerno.
Confiscated in 1547, it was eventually sold in the 1580s to the Jesuits who turned it into a basilica, retaining the stonework of the original palace facade.
Legend has it that the symbols engraved on the facade's diamond-shaped stones were supposed to herald good luck, channelling positive energy to the interior of the building. But for some reason, the symbols were engraved inversely on the stones, turning good luck to bad.
SEE ALSO: Dinosaur Skull Found in Church
Indeed, a number of disasters struck the building, including fires, earthquakes and two major collapses of the church's immense dome.
According to De Pasquale, the use of some sort of coded signs to compose a musical score wasn't unusual for that time.
"Another palace of the Sanseverino princes features musical notes engraved in its stones," De Pasquale said.