Porta Valbona, Renaissance city gate in Urbino, Italy.

Porta Valbona is a stone-arched city gate that forms part of Urbino's fortification system and marks an important historical entrance to the old town. The structure features military design elements built into the defensive walls to protect the settlement.

The gate was built during the 15th century as part of fortification works that strengthened the city during a period of regional conflicts. This construction phase reflects how crucial it was to reinforce the city's defenses at that time.

The gate carries a Latin epigraph placed in 1621 for the wedding of Federico Ubaldo della Rovere and Claudia de' Medici, still visible in the centre of the frieze. Two eagles flank the gate, added in the early 18th century under Pope Clement XI; the architect Carlo Fontana was consulted but only the eagles by Giovan Francesco Buonamici were made.

The gate is easily reached on foot and connects walking paths that lead through the historic streets of the old town. Visitors should wear comfortable shoes since the cobblestone streets in this area are uneven.

Inside the gate, a niche held a painted stone Virgin and Child made by a German-area artist around the mid-15th century; it was moved to the Galleria Nazionale delle Marche in 1990 to protect it from the weather, and a painted clay copy by a local artist was placed there in 2005.