The Western Wall was built by King Herod in 20 BC during his expansion of the Temple enclosure, and is part of a retaining wall that enclosed the western part of Temple Mount. According to the Roman-Jewish historian Josephus, construction of the walls took 11 years, during which time it rained in Jerusalem only at night so as not to interfere with the workers' progress. In 70 AD, the Romans destroyed Jerusalem and its Temple. During the Ottoman Period (beginning in the 16th century), the wall became the Jews' chief place of pilgrimage, where they came to lament the destruction of the Temple. For centuries, the Western Wall was located in a narrow alley just 12 feet wide that could accommodate only a few hundred densely packed worshipers. But in 1967, immediately after the Six Day War, Israelis leveled the neighboring Arab district to create the Western Wall Plaza, which can accommodate tens of thousands of pilgrims.