Guru Nanak Dev Ji did.
Yes, some symbols that represent the gurdwara include the Nishan Sahib (Sikh flag), the Khanda (emblem representing Sikhism), and the Ek Onkar (the symbol representing the one supreme god in Sikhism).
Well, Sikhism used to be Hinduism, so it probably deals with peace, non violence, and also a famous motto: Mind, intelligence, learning.
It is called Sikhism.
Sikhism
Sikhs believe in Sikhism.
Sikhs are the followers of Sikhism.
There were no mean leaders in Sikhism.
Sikhism was founded by Guru Nanak Dev Ji. So he became the 1st Guru of Sikhism.
sikhism started in talwandi in west punjab
the religion of khanda is Sikhism !
It hasn't. Sikhism as a religion still exists.