Gwalior Monument, Kolkata - Credit: Wikimedia Commons
The Gwalior Monument, also known as Ellenborough's Folly, or The Pepperpot, is an octagonal cenotaph about high, crowned with a bronze dome cast from guns captured from the Marathas. It was erected in 1847 by Lord Ellenborough, the Governor-General of India, as a memorial to the officers and men who fell during the Gwalior War in 1843. Read more on Wikipedia
Source: en.wikipedia.org