Answer: Guru Gobind Singh Ji
Notes: Guru Gobind Singh built five forts at Anandpur Sahib, Punjab, for Sikh defense against Mughals and hill Rajas. These include Anandgarh, Lohgarh, Holgarh, Fatehgarh, and Taragarh. Connected by earthworks, the original forts were later replaced by Gurdwaras in the 20th century.
