On Beliaghata Main Road, a little under a kilometre southeast of the point where the road crosses the canal lies a mysterious, abandoned mosque. I say abandoned because the mosque is not used for prayers by Muslims anymore, although it is far from empty. What was once a mosque is now used as a residential building and storage space. I first found out about the abandoned mosque in Beliaghata from a Facebook post by my friend Avijit Das. Avijit and Souvik had been alerted to the presence of the mosque by another Facebook post. “Sayan Banerjee had posted about the mosque, claiming that it was the oldest mosque in Kolkata and that it was ASI property”, Souvik told me. But when they visited the site, they found it to be occupied by a Hindu family. Souvik was able to identify the family as Vaishnava based on the “kanthi” or wooden necklace that a male member of the family was wearing. The sheer ridiculousness of a Vaishnava family living inside a mosque was enough to pique my curiosity, and so I decided to do some investigation of my own.