The seven South Elmham villages; St James, All Saints, St Nicholas, St Cross, St Margaret, St Michael and St Peter, to which may be added Homersfield, sometimes referred to as South Elmham St Mary, lie in a scattered group between Bungay and Halesworth in NE Suffolk, to the W of the Roman road known as Stone Street. North Elmham (the centre of the see until 1071) is over 30 miles away, to the NW of Norwich, and both apparently took their name from Aethelmaer (bishop of E Anglia 1047-1070) the landholder before the Conquest. This is not certain; Tricker suggests that the name meant villages where elm trees grew. The land here is flat, generally arable and sparsely populated; the villages rarely more than a few houses clustered around the church without shops or pubs.
St Cross consists of a loose cluster of houses around a crossing of The Beck, a stream that runs into the Waveney. The church is on rising ground on the N side of the stream, with a moated hall site 500 yards to the E. It consists of nave, chancel and W tower; both nave and chancel being very tall. The aisleless nave is 12thc. with original doorways surviving on the N and S. The S is under a 14thc. -15thc. porch, and the N is badly damaged and blocked. The original nave windows are all gone, having been replaced by 15thc. windows at upper and lower levels (i.e. effectively a clerestory above the main lateral windows). The E gable of the nave is crow-stepped. The chancel arch is 19thc, but there are windows with intersecting tracery at the N and E of the chancel, suggesting a date ofc.1300. The S chancel windows and the brick S doorway are 15thc. The W tower is 14thc., of knapped flint with chequerwork on the buttresses similar to that at South Elmham St Peter. The parapet battlement is 15thc. and decorated with tracery patterns in flushwork, also similar to St Peter's. Construction is otherwise of flint with traces of render remaining on the nave and chancel, and knapped flint for the S porch. Work on reseating the nave and a W gallery were carried out by J. D. Botwright of Bungay in 1840-41. The two nave doorways are the only Romanesque features.