The Pisan Cross is the symbol of the northern Italian city of Pisa and its predecessor state, the sovereign maritime Republic of Pisa. was the coat of arms of the people of Pisa, granted to them by Pope Benedict VIII to fight Saracens in Sardinia in 1017.

This article does not cite any sources. (June 2011)

The Pisan cross is technically described as with keys (or paws) and three spheres on every arm. Its symbolism is unknown; the cross itself may represent Christ, and the twelve spheres his Apostles.

Although the Pisan cross itself dates to 1017, the oldest surviving representation is a carving on the city walls, built in 1156 by counsellor Cocco Griffi. The city flag, red with the white cross on it, was officially recognized by Pope Callixtus II. The previous flag of Pisa was a plain field of vermillion, derived from the flag of Imperial Rome.

• Oldest representation of the Pisan Cross (1156)
• Flag of Pisa
• Ensign of the Italian Navy, sporting the coat of arms of the four main maritime republics. Clockwise, starting from the upper left: Venice, Genoa, Pisa, Amalfi.

• Occitan cross, a similar figure