The Old Gate (Altpoertel) is the medieval west city gate of Speyer, and is one of the original 68 towers in the old walls and gates. Today it is one of the largest and most architecturally significant of the remaining city gates in Germany.
The Old Gate was built between 1230 and 1250 on the ruins of a previous tower. The bottom of the 13th century tower remains as the foundation but, in 1511, Speyer's mayor ordered that the tower be rebuilt, so the top portion is newer. It was completed in 1514. It was originally built as an exterior gate, connecting the old town with the suburb of St.Gilgenvorstadt. A 20 metres high roof was added in 1708.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.