The present-day gurdwara was rebuilt in 1764 by Jassa Singh Ahluwalia with the help of other Sikh Misls. In the early nineteenth century, Maharaja Ranjit Singh founded the Sikh Empire and covered the upper floors of the gurdwara with gold, which gives it its distinctive appearance and its English name. It contains the Sri Guru Granth Sahib ji, the Sikh scripture. In June 1984 the Golden Temple complex was blown apart by tanks, snipers, grenades and rocket launchers by the Indian military and government. It was once again attacked at a smaller scale by the Punjab Police, National Security Guard and Border Security Force in 1986 as part of Operation Black Thunder 1 from April-July 1986 and Operation Black Thunder 2 in May 1988.