Historic gurdwara

Gurdwara Darbar Sahib, Dera Baba Nanak

ਡੇਰਾ ਬਾਬਾ ਨਾਨਕDera Baba Nanak, Punjab, India

The town and gurdwaras across the Ravi from Kartarpur, which grew up where the ashes of Sri Guru Nanak Dev Ji were reburied by Baba Sri Chand.

History

1539
The reburied urn
The ashes of Sri Guru Nanak Dev Ji were buried near Kartarpur, but a flood soon washed the monument away. Baba Sri Chand had the urn recovered and reburied, and the town grew around that place.[EoS][EoS]
Today
Sri Chola Sahib
The robe revered as worn by Sri Guru Nanak Dev Ji is kept here by Guru Ji's Bedi descendants. The custodian's booklet says the sangat has darshan of it on 4 to 7 March each year, during the Chola Sahib fair.[Src][EoS]

A sketch of the writing on the robe at Dera Baba Nanak said to have belonged to Sri Guru Nanak Dev Ji. The date is uncertain and the source is a web article.
Unknown, Early to mid 20th century, uncertain. Public domain. Source
Gurdwara Sri Chola Sahib at Dera Baba Nanak, a modern photograph from 2019. The Chola itself is kept in a nearby family home, according to the Encyclopaedia of Sikhism.
Harvinder Chandigarh, 2019.CC BY-SA 4.0. Source
Gurdwara Dera Baba Nanak, printed in the Mahan Kosh of 1930. Commons says the photograph probably dates from the 1920s.
Kahn Singh Nabha, c. 1920s. Public domain. Source
A later artist's imagining of Sri Guru Nanak Dev Ji in a robe with Arabic-script writing and Japji verses. The Sikh Museum site suggests the Chola Sahib may have inspired it.
Unknown, 19th century. Government Museum and Art Gallery, Chandigarh (as credited on the Sikh Museum site). Public domain. Source