There are no idols, statues, or religious pictures in a gurdwara, but the essential feature of a gurdwara is the presiding presence of the holy book and the eternal Sikh Guru, the Guru Granth Sahib.
There are no idols. There are statues. There are religious pictures in a gurdwara. The essential feature of a gurdwara is the presiding presence of the holy book. The essential feature of a gurdwara is the presiding presence of the eternal Sikh Guru. The Guru Granth Sahib is the eternal Sikh Guru.