Church of St Mary Coslany

St Mary Coslany is one of the most historic of the many medieval churches of Norwich, and it holds a special distinction: it is the only surviving medieval round-tower church in the whole city. Standing on St Mary's Plain in the Coslany district, on a low ridge above the once-marshy ground to the south-west, it is a church of Saxon origin whose round flint tower has stood for some nine centuries. In a city famous for having more medieval churches than any other north of the Alps, St Mary Coslany is among the oldest and most remarkable, a precious survival from the very earliest Christian Norwich.

The church is believed to be of Saxon origin, predating the Norman Conquest, and to have served the early settlement of Coslany, one of the riverside communities from which Norwich grew. Records confirm that the church was in existence by the late twelfth century, and archaeological evidence suggests that an earlier, possibly timber, church may have stood to the north of the present building before the stone church was raised on its current site. The surrounding area was once a place of trade and industry: the street running south and east of the church was known as Soutergate, the "Shoemakers' Street", as early as the fourteenth century, reflecting the leatherworking that flourished here, while the church on its ridge overlooked the boggy low ground known as the Muspol.

The church's most distinctive feature is its round tower, built of flint and dating from the eleventh or twelfth century — the Saxo-Norman period — and retaining triangular belfry openings that point to Saxon influence. Round towers are a characteristic feature of the churches of Norfolk and Suffolk, where the lack of good building stone made the round form, built of local flint, easier to construct than a square tower with dressed-stone corners; but in Norwich itself, St Mary's is now the only one to survive intact, the round tower of St Benedict's having been reduced to a ruin and that of St Julian's being a modern reconstruction. The tower thus makes St Mary Coslany unique among the city's churches.

The body of the church is unusual too, for it has a cruciform plan — relatively rare among the parish churches of Norwich — the result of a major remodelling in the fifteenth century, when the nave was widened and heightened and transepts were added. The records allow this great rebuilding to be dated with unusual precision, thanks to the bequests of individual parishioners: the north chapel was built around 1464 following a bequest by Gregory Draper, the chancel was rebuilt around 1466 with money left by Richard Cagge, and the nave arcade piers date from about 1477, the gift of Thomas Galard, while the north transept, known as Thorp's Chapel, was founded by Robert Thorp, who died in 1467. The church was substantially rebuilt in 1477, in the great age of East Anglian church-building funded by the wealth of the wool and cloth trade.

The interior preserves treasures of this medieval rebuilding. The church retains its medieval roof, which survived the bombing of Norwich in the Second World War, and at the crossing is a fine fifteenth-century carved wooden roof boss depicting the Virgin Mary. A detailed certificate and inventory of the church's furnishings and liturgical goods, drawn up in 1552 during the Reformation and presented to the Bishop of Norwich and the royal commissioners, gives a vivid picture of how richly the church was once furnished before the religious changes of the sixteenth century stripped away much of its medieval ornament.

St Mary Coslany stands within a large churchyard on St Mary's Plain, an open green space that has long been distinct from the surrounding streets, the church occupying the southern part of the plot with the burial ground spreading to the north and east. Like many of Norwich's medieval churches, it is no longer needed for regular parish worship in a city that once had far more churches than it now requires, but it is cherished as a historic building and a key part of the city's extraordinary medieval heritage.

The church lies in the Coslany area, just north of the River Wensum in the heart of historic Norwich. The medieval city, with its magnificent Norman cathedral, its great castle keep, its cobbled lanes and its many surviving churches, lies all around; the famous Norwich Lanes with their independent shops, the riverside walks along the Wensum, the medieval St Miles bridge, and the wider attractions of one of England's finest medieval cities are all within easy reach.

From a Saxon church serving the early settlement of Coslany, through its round flint tower of the eleventh or twelfth century, the great fifteenth-century rebuilding funded by the bequests of its parishioners, and the medieval roof and boss that survived the Blitz, St Mary Coslany gathers nine centuries of Norwich history into one building. The only intact medieval round-tower church in the city, it remains one of the most distinctive and precious of Norwich's churches — a Saxon survival on St Mary's Plain, at the heart of England's great city of medieval churches.