Palacio de los Luna, Renaissance palace in Coso Street, Zaragoza, Spain.

The Palacio de los Luna is a Renaissance palace on Coso Street in Zaragoza, Spain, featuring a monumental facade with twin towers. The stone-built ground floor contrasts with the brick upper levels, which are decorated with rectangular balconies and semi-circular arches.

The palace was built between 1551 and 1553 for Pedro Martinez de Luna, Count of Morata and Viceroy of Aragon. Later it served as a residence for Captains General of the region.

The portal's arch is flanked by two giant statues carved by Guillaume Brimbez in 1552: Hercules on the right and, on the left, a figure identified as Geryon or, in other sources, Theseus. Above them a frieze shows Caesar's triumph, with cupids and a vase of virtue on one side and two fauns on the other; the tympanum carries Helios with Aurora and the Moon.

The palace stands at Calle Coso n.º 1, at the corner where the street numbering of Zaragoza begins, with even numbers on the right and odd on the left. It houses the Tribunal Superior de Justicia de Aragón, so the building is a working court: the entrance portal with the Hercules and Gerion statues can be viewed from the street, but interior visits depend on court activity.

The stones used in the building's foundation were extracted from Zaragoza's ancient Roman walls, connecting the structure to the city's earliest origins. This reuse shows how Renaissance builders incorporated local materials and historical memory into their new constructions.