Final answer:
Guru Ramdas Ji became 'Joti Jot' in 1581 in Amritsar. He was the fourth Sikh Guru and the founder of the city of Amritsar, where the Golden Temple is located.
Step-by-step explanation:
Guru Ramdas Ji, the fourth of the eleven Sikh Gurus, became 'Joti Jot' (immersed in the Eternal Light) in the year 1581 in the city of Amritsar.
This event marked the end of his physical existence and the passing on of the Guruship to his successor, Guru Arjan Dev Ji. Guru Ramdas Ji is greatly revered in Sikhism and was responsible for founding the city of Amritsar, where the sacred Golden Temple, also known as Sri Harmandir Sahib, stands as the spiritual and cultural center of the Sikh religion.