Completed in the 11th century.
Description from English Heritage website
“TG 2309 SW ST. MARTIN AT PALACE PLAIN 11/803 26.2.54 Church of St. Martin-at-Palace – I Former church now redundant and used as store. C11, C15 and C16. Flint with stone dressings. Lead roof. Towest tower. Nave and chancel with north and south aisles stopping short of east wall. South porch. Unbuttressed 3-stage tower. 3-light perpendicular west window. Square sound holes with tracery and 2-light reticulated tracery belfry windows. Crenellated parapet with tracery panels and corner pinnacles. 3 bay nave clerestory windows square in the quatrefoil tracery. 2-storeyed porch attached to aisle. Remade outer doorway with 2 windows above. Two 3-light re-faced perpendicular nave windows and one identical chancel aisle window. 2-light decorated west window in north aisle. 2 C19 north aisle chancel windows, 2 three- light perpendicular windows in the east end of aisles. Long and short quoins to former unaisled chancel. 3-light perpendicular east window with pointed arch. http://list.english-heritage.org.uk/resultsingle.aspx?uid=1372511