The citadel of Jaca is a fortress of pentagonal plant, built in the late sixteenth century (work began in 1592), which preserves each and every one of its characteristic parts: moat, ramparts, bastions, barracks, arsenals, tunnels, etc. Along with a beautiful entrance to which is accessed through a drawbridge. Its construction was entrusted to Tiburzio Spannocchi, engineer of Italian origin in the service of Felipe II, in a program of defense of the Aragonese border with France, the main point would be precisely this castle.
The chapel belongs to the model of small rural Romanesque churches, and can be dated to the second half of the twelfth century, most likely in the final years of this century.
The origins of this Museum are rooted in the collection of lead figurines which were gathered from the sixties onwards by Carlos Royo-Villanova, a miniatures fan and history lover. The little lead soldiers and their accessories, all to the same scale, (1:87, or some 20 mm in height), were mostly produced by Valencia-based company Alymer, which sold the figurines under the Miniploms name. Armies from the world over were formed with excitement and lots of patience, with more than 35.000 pieces covering many periods of history.
The Clock Tower, also popularly known as the Prison Tower, is one of the most striking buildings that make up the historic center of the town. It is an interesting example of civil Gothic which was built in 1445 as part of a private residence on the same site where the palace of the Aragonese monarch, destroyed by fire in 1395. In the past it was also home built Merino Tower of jail and since 1986 has the status of headquarters of the Working Community of the Pyrenees.