The temple is built around a man-made pool (sarovar) that was completed by Guru Ram Das in 1577. Guru Arjan – the fifth Guru of Sikhism, requested Sai Mir Mian Mohammed – a Muslim Pir of Lahore to lay its foundation stone in 1589. In 1604, Guru Arjan placed a copy of the Adi Granth in Harmandir Sahib, calling the site Ath Sath Tirath (lit. "shrine of 68 pilgrimages"). The temple was repeatedly rebuilt by the Sikhs after it became a target of persecution and was destroyed several times by the Muslim armies from Afghanistan and the Mughal Empire. The army led by Ahmad Shah Abdali, for example, demolished it in 1757 and again in 1762, then filled the pool with garbage and blood of cows. Maharaja Ranjit Singh after founding the Sikh Empire, rebuilt it in marble and copper in 1809, overlaid the sanctum with gold foil in 1830. This has led to the name the Golden Temple.