Before 1905, the Golden Temple had Brahmin priests, idols and images

Before 1905, the Golden Temple had Brahmin priests, idols and images for at least a century, attracting pious Sikhs and Hindus. In 1890s, these idols and practices came under attack from reformist Sikhs. In 1905, with the campaign of the Tat Khalsa, these idols and images were removed from the Golden Temple. The Singh Sabha movement brought the Khalsa back to the fore of Gurdwara administration over the mahants (priests) class, who had taken over control of the main gurdwaras and other institutions vacated by the Khalsa in their fight for survival against the Mughals during the 18th century and had been most prominent during the 19th century.

https://en.m.wikipedia.org/wiki/Golden_Temple 

https://en.m.wikipedia.org/wiki/Singh_Sabha_Movement