In AD 757 King Æthelbald of Mercia was assassinated at Secandune. Continuations of the Historia ecclesiastica gentis Anglorum say he "was treacherously and miserably murdered, in the night, by his own guards". The Domesday Book of 1086 records Secintone as a vill with a manor of five hides.
The Church of England parish church of All Saints is probably mid- to late-13th century in origin, but was significantly altered in a late 19th-century Victorian restoration. The west tower and spire were rebuilt in 1883, re-using much of the original material. The bell-openings are Early English, the ogeed west window is Decorated Gothic and the parapet and spire are Perpendicular Gothic. The spire has two sets of lucarnes. The nave and chancel are Decorated Gothic with 14th-century windows. The chancel east window has five lights and intersecting tracery, and is said to have been widened in the restoration. There is extensive use of ogees. As well as in the west window of the nave, ogees feature in two south windows of the nave, one south and two north doorways and a double piscina in the chancel. All Saints had a rood screen and rood loft, traces of which are visible in the east wall of the nave on both sides of the chancel arch. Outside, on the south wall of the nave east of the porch is a scratched mass dial. All Saints' church monuments include a defaced recumbent effigy of a lady in early 14th-century dress, and a Jacobean wall-mounted monument to Robert Burdett, who died in 1603. He is an ancestor of the Burdett baronets of Bramcote. His monument is of veined marble, with Corinthian columns flanking kneeling figures of his family. The west tower has a ring of four bells. Robert Mellours of Nottingham cast the treble bell in about 1520; it is inscribed with the name IESUS. Hugh II Watts of Leicester cast the tenor bell in about 1640. John Taylor & Co of Loughborough cast or re-cast the second and third bells in 1886 for the rebuilt tower. The ring is unusual in that the third bell, not the tenor, has the largest diameter. All Saints has been a Grade II* listed building since 1953. All Saints is now part of the Benefice of All Souls, which also includes the former parishes of St Nicholas, Austrey; St Mary the Virgin, Newton Regis; St Matthew, Shuttington and Holy Trinity, Warton.
Other listed buildings
Seckington has four Grade II listed buildings. Rock Farmhouse is partly 17th century, with late 18th century additions. Old Hall Farmhouse is late 17th or early 18th century, with late 18th and early 19th century additions. The Old Rectory was 18th century but was largely rebuilt in about 1870. Church Farmhouse is late 18th or early 19th century.
