Self-Portrait. Painting by Rembrandt Harmenszoon van Rijn

Guru Nanak Dev was a great reformer and one of the prominent leaders of the Bhakti movement that swept across the country during 15th –16th century. He was born in an age of religious bigotry when Hindus and Muslims were clashing frequently for the protection of their respective faiths. Nanak was much distressed at this religious conflict and so he pleaded for liberalization in the religious practice