Chaeng Watthana Government Complex, or formally, the Government Complex Commemorating His Majesty the King's 80th Birthday Anniversary, 5 December, BE 2550 (2007), is a complex of Thai Government buildings on Chaeng Watthana Road, Thung Song Hong Subdistrict, Lak Si District, Bangkok. The complex was built in commemoration of King Bhumibol Adulyadej's 80th birthday. The complex construction project started in 2005 under Thaksin Shinawatra's regime and was completed in 2008.