Archaeological remains from the ancient Israelite period include the Siloam Tunnel, an aqueduct built by Judahite king Hezekiah and once containing an ancient Hebrew inscription, known as the Siloam Inscription; the so-called Broad Wall, a defensive fortification built in the 8th century BCE, also by Hezekiah; the Silwan necropolis with the Monolith of Silwan and the Tomb of the Royal Steward, which were decorated with monumental Hebrew inscriptions; and the so-called Israelite Tower, remnants of ancient fortifications, built from large, sturdy rocks with carved cornerstones. A huge water reservoir dating from this period was discovered in 2012 near Robinson's Arch, indicating the existence of a densely built-up quarter across the area west of the Temple Mount during the Kingdom of Judah.