Palazzo San Massimo, Medieval palace in Salerno, Italy.

Palazzo San Massimo, also called Palazzo Maiuri, stands in the upper part of Salerno's historic centre, in the area once known as Plaium Montis. The complex covers about 3,700 m² over four levels: 250 m² on the first, 1,400 m² on the second, 1,300 m² on the third and 700 m² on the fourth. Part of the building still spans the public alley, vicolo San Massimo.

The building was constructed by Prince Guaiferio in the second half of the 9th century and was closely linked to the neighboring church of San Massimo. Foundation records document the establishment of this princely complex in Salerno.

Marble blocks in the walls carry inscriptions that reveal how the prince wanted to be remembered and what mattered to the nobility. These messages show the connection between worldly power and spiritual faith that shaped daily life here.

The complex covers about 3,700 m² over four levels: 250 m² on the first, 1,400 m² on the second, 1,300 m² on the third and 700 m² on the fourth. Part of the building still spans the public lane, vicolo San Massimo, so the upper storeys can be seen from the alley below.

In 1900, during consolidation work, two large marble blocks were found inside the palace; they originally formed a single inscribed stone. The surviving text, translated by Sinno, reads: "Prince Guaiferio, by divine inspiration, built these two things, the beautiful walls of the house." The missing piece probably referred to the church, and the inscription allowed the church's exact position to be identified.