If you're visiting the Armenian Church, I advise to combine it with Lalbagh Fort and Ahsan Manzil, since they're quite close. Consider, it can take you 2-3 hours in the traffic alone.
The Armenian church of Dhaka is a lovely historical place. Being Armenian, I couldn't miss this place while in Dhaka. It's well maintained by the only Armenian currently living in Dhaka, Mr. Martin and a Hindu family that helps him around. This church is a very lovely runaway from the noise of Dhaka. We did ask to meet Mr. Martin, who's an old man, and had a lovely chat with him. The church is located in the old part of Dhaka, so if you're new to Dhaka, consider seeing and smelling all kinds of unpleasant stuff before you get there.
Overall, definitely worth visiting!
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