St Matthias Old Church is the modern name given to the Poplar Chapel built by the East India Company in 1654, in Poplar in the East End of London. The church is designated a Grade II* listed building. St Matthias Old Church is one of the very few extant churches built under the Commonwealth (others include those at Berwick-on-Tweed, Staunton Harold, Ninekirks and Brougham.)