Bisarno Castle, Medieval fortress in Florence, Italy.

Bisarno Castle is a medieval fortress in Florence featuring octagonal stone pillars and wooden beamed ceilings throughout its rooms. The interior spaces are organized by these characteristic pillars, demonstrating the building techniques of that period.

The castle began as a 13th-century fortress in the area of the "lame", streams and ditches that formed a branch of the Arno called Bisarno. In the mid-14th century it belonged to the Bardi, then passed to the Biliotti and in the 16th century to the Capponi, whose coat of arms is visible on the gate. From 1869 to 1880 it housed the English ambassador James Hudson.

The interior preserves stonework and decorative details that reflect the tastes of the Florentine noble families who inhabited the castle. These elements reveal how residents expressed their artistic preferences in their daily surroundings.

Bisarno Castle stands on Via di Badia a Ripoli in south-eastern Florence, next to the church of San Piero in Palco. The sources give no opening hours or visitor arrangements, so treat it as a building seen from the street rather than a monument with a set route.

The scientist and explorer Odoardo Beccari lived in the castle and planted rare species there that still exist. The Guelf-style battlements are partly original and partly restored, and the Capponi coat of arms can be seen on the gate.