This dilapidated Mughal-era structure is about the oldest building in Dhaka, and searching for it among the high-walled, pinched alleyways of this part of the city is a highlight of a wander around Old Dhaka. Chota Katra, which dates from 1663, was a caravanserai for visiting merchants. It was similar in design to Bara Katra, but there’s not much left, save the archways at either end, which now house small shops in their recesses.