A substantial part of the walls that surrounded Segovia in mediaeval times, starting at the Alcázar fortress, are preserved.They were rebuilt in the 11th century of limestone masonry with large granite blocks and blind arches and towers. The San Andrés gate is preserved between two large towers, as are the gates of San Cebrián and Santiago, both with horseshoe arches over dressed stone. Originally there were two more gates, but they no longer exist. Inside, in the former guards' headquarters, the Wall Information Site offers a more extensive view of the walled area protecting the higher section of the city. You can also visit the ramparts, which offer magnificent views of the Jewish quarter and the city's mediaeval military architecture, as well as the Jewish cemetery on the other side of the Clamores valley.