Guru Nanak was born in the city of Nankana Sahib, which is now in Pakistan, near Lahore.

Guru Nanak's father was named Mehta Kalu, who was a village accountant.

Guru Nanak's wife was named Mata Sulakhni, and they had two sons, Sri Chand and Lakhmi Chand.

Guru Nanak's first disciple was Bhai Mardana, who was a Muslim musician.

Guru Nanak traveled extensively for 25 years, visiting various places and spreading his teachings.

The central teachings of Sikhism include truthfulness, non-violence, equality, and the remembrance of God.

The holy book of Sikhism is called the Guru Granth Sahib, which contains the teachings of Guru Nanak and other Sikh Gurus.

The five essential articles of faith in Sikhism are Kesh (uncut hair), Kangha (comb), Kara (steel bracelet), Kirpan (sword), and Kachera (short breeches).

The Sikh place of worship is called a Gurdwara, where Sikhs gather for prayers and religious ceremonies.

The annual Sikh festival that celebrates the birth of Guru Nanak is called Guru Nanak Jayanti, also known as Prakash Gurpurab.

The Sikh festival that celebrates the harvest season is called Vaisakhi, which also marks the beginning of the new year in the Sikh calendar.

The Sikh festival that celebrates the victory of good over evil is called Diwali, which is also known as the festival of lights.

The Sikh festival that celebrates the bravery and martial spirit of the Sikhs is called Hola Mohalla, which is held a day after the festival of Holi.

The Sikh military order founded by Guru Gobind Singh is called the Khalsa, which means 'pure' or 'chosen'.

The Sikh scripture that contains the teachings of Guru Gobind Singh is called the Dasam Granth, which includes compositions like the Jaap Sahib and the Akal Ustat.