Gurupurab, Guru Nanak Jayanti, or Prakash Utsav is one of the most important festivals in the Sikh calendar. Guru Nanak Dev was the founder of Sikhism in the 15th century. This year, the 555th birth anniversary of the Sikh Guru will be observed. The sacred site of Sikhism spread across India and Pakistan. These pilgrimage sites hold deep spiritual importance for Sikhs and are visited by devotees worldwide. Here’s a guide to some of the most revered Sikh holy places, each reflecting the devotion, history, and teachings of Sikh Gurus.