The walls that surrounded the complex were at least 2.75 feet (0.84 m) thick and varied in height from 9 to 12 feet (2.7–3.7 m). The northern wall, which enclosed the church, was 9 feet 6 inches (2.9 m) high and made out of adobe bricks. It has been destroyed by fire or abandoned because there was no room inside the wall. The southern wall was 12 feet 6 inches (3.6 m) high and made out of limestone blocks. This wall still stands today near the corner of San Antonio's Castilla Square (which is a public park) and Navarro Street. The eastern wall was 8 feet 10 inches (2.8 m) high and made out of limestone blocks. This wall also still stands today but in a different location - near the corner of Houston and Navarro Streets. The western wall was 8 feet 10 inches (2.8 m) high and made out of limestone blocks. This wall too still stands today but in a different location - near the corner of De Zavala and Market Streets. So, all four walls of the Alamo were between 2.5 and 3 feet (0.7-1.0 m) thick.