434 EC, is a historic building located in West Marredpally, Secunderabad, Telangana, India, serving as a hub for Masonic activities in the region.

434 EC was founded in 1822 by British military officers stationed in the Secunderabad Cantonment, a key base for the East India Company.

Its establishment reflects the cultural influence of the British military and its enduring legacy in Secunderabad.

Many prominent members of the region, both British and Indian alike, have been part of the lodge, many of whose ancestors as far from the British Isles still continue to visit the lodge.

It is primary meeting place of freemasonry in Secunderabad alongside Goshamahal Baradari.