One of the rectangular stones which make up the compound wall of the Urvashi theatre located on Lalbagh Road has carvings on it. Of a worshipper praying to somebody, maybe a form of God. I cannot describe correctly as i've not viewed from close quarters.
I don't know if this block was created years or probably even a century ago. But it does appear to be quite old. Do notice when you are on Lalbagh Road the next time.