Description from record TR 35 NW 87:
5275 Chapel remains behind No. 11, Strand Street (South side). TR 3358 1/35A 19 5 50 Grade 2. Early C13 roofless chapel, with upper part partly built in yellow Dutch brick. One lancet and one 2-light window. There are brick arches built into the walls at ground floor level giving the appearance of once having been a vaulted crypt. (1) Roofless 13th century building in Three King's Yard. The building known locally as the "Chantry Chapel" may have been used as such, but all available evidence indicates that it was first built as a hall andcellar type house of the 13th century. The only known chantry in the part of Sandwich was "Burton's Chantry" (TR 35 NW 812), which Boys, in his "History of Sandwich", 1799 says was "...at, or near Davy's Gate", now known asthe Barbican. As Burton's Chantry was founded in the fourteenth century, the building in Three King's Yard could not have been built for that purpose. A long stone and flint building once stood on the site of the present Admrial Owen inn, at the corner of Strand Street and High Street, and of this, one wall, with a 14th century piscina still remains between the Admirial Owen and No 3 Strand Street, and this may have been the original Chantry Chapel. The present building is of flint and stone rubble, with stone dressings, and was originally on two floors. There remains one small loop window of the undercroft, measuring only 7 ins wide by 1 ft 8 inshigh, but splaying out to 2 ft 2 ins wide inside. See illustration cards nos 1 and 2. At the south end of the undercroft is a narrow stone doorway, 1ft 9ins wide, and now only 3 ft 9 ins high, - because the original floor level was about 2 ft 6 ins below the present level. This doorway was presumably the entrance to a staircase to the upper floor. There is also one store jamb of a wider, 'outer' doorway near the north west corner. This undercroft was never vaulted and must have had a wooden floor above it, as most of such buildings had. In the upper floor, two windows remains, a single lancet towards the south end, and a double lancet nearer the north end. The stone quoin at the north east corner remains intact up to wall plate level, but other part have been repaired in small red brick. The house was made into a dwelling in the seventeenth century and fireplaces etc added, presumably by an immigrant Dutch family of which there were many in the town at this time. (2)

The following text is from the original listed building designation:
1. 5275 STRAND STREET (South Side)
Chapel remains behind No 11 TR 3358 1/35A 19.5.50.
II GV
2. Early C13 roofless chapel, with upper part partly built in yellow Dutch brick. One lancet and one 2-light window. There are brick arches built into the walls at ground floor level giving the appearance of once having been a vaulted crypt.
Nos 3 to 15A (odd) Three Kings Yard (Nos 1 to 5 (consec)). Pump and Railings, Chapel Remains and Nos 19 to 23 (odd) form a group with Nos 8 and 10 High Street.
Listing NGR: TR3312558239 (3)

Historic England archive material: BF039748 CHANTRY CHAPEL, SANDWICH File of material relating to a site or building. This material has not yet been fully catalogued. Copyright, date, and quantity information for this record may be incomplete or inaccurate.
BF110907 The Sandwich Project

<1> DOE(HHR) Dist of Dover Kent 1976 125 (OS Card Reference). SKE40948.

<2> Typescript notes unpublished (E W Parkin) (OS Card Reference). SKE50692.

<3> English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.