the stone plaque carved in deep relief with the bundles of rods in cruciform, with a ribbon-tied surmount, heavily weathered,

The device of the “fasces” or bundle of rods dates back to at least Roman times. The bundle of rods is a motif denoting power – often associated with magistrates. The idea is that a bundle of rods is stronger than a single one. The motif is often represented as a bundle of birch sticks, ribbon-tied and centred with a small axe. It was a device adopted by the Nazi’s in the mid-20th Century but having been widely adopted in iconography both sides of the Altantic prior it is iconography that has not been as tarnished as perhaps the swastika – despite that it is the origin of the term “fascist”.

A history of St Mary’s gleaned from Wikipedia:

St Mary’s was established in the first half of the 12th century as a daughter church of Beverley Minster, to serve Beverley’s trading community. It is a cruciform church, 197 feet in length, with aisled nave and chancel, south transept with east aisle, north transept with east chapel and crypt below, northeast chapel with adjoining sacristy and priests’ rooms above, and a crossing tower.
A few 12th and early 13th century fragments remain scattered throughout the church. These are numerous enough to determine that by the mid-13th century, the church consisted of an aisle-less chancel and transepts, an aisled nave, and probably a crossing tower.
Systematic rebuilding began in the late 13th century, during the Decorated period, when a large chapel was added on to the east side of the north transept. This was followed c. 1300 by the addition of a south aisle to the previously aisle-less chancel, in conjunction with a widening of east aisle of the south transept. The nave aisles were completely rebuilt in the early 14th century. In the 1330s or 1340s the chancel was given a north aisle, the three easternmost bays of which were made into a superb chapel with Flowing tracery and a tierceron-star vault. The mouldings of the tracery, windows, vault, and piers all merge fluidly with each other, unifying the space. The mouldings of the vault ribs on the north wall spring from the floor and form fluted columns without capitals, and on the south wall spring from the column capitals, intersecting and running through the arcade mouldings.
Building work at St Mary’s ceased in the mid-14th century, as in so many cases throughout England, because of the Black Death. It did not resume until c. 1400, when the west front was rebuilt in the Perpendicular style and a Perpendicular clerestory was added to the nave. The south porch and a clerestory for the chancel followed in the early 15th century. The transepts were rebuilt with clerestories in the mid-15th century; the Early Gothic arches were reused, but set on new piers. Bequests for this work were made in 1451-3, and further bequests in 1498-1500 funded the rebuilding of the west end of the nave aisles. Also installed throughout the 15th and into the 16th centuries were the series of fine wooden ceilings for which the building is known. The most recognized is the chancel ceiling, originally of the mid-15th century but entirely repainted in 1863, with depictions of forty English kings from the mythical Brutus through Henry VI, and a portrait of George VI from 1939.
During Evensong on 29 April 1520, the central tower collapsed, ‘and overwhelmed some that then were in [the church]’. Much of the work on the eastern end of the nave was undone, though the aisle walls were little damaged. The central tower and the nave arcades and clerestory were entirely rebuilt, though the clerestory windows appear to be of c. 1400: Pevsner suggests that “[p]ossibly they were reused in spite of the radical damage done by the falling tower”.[3] This rebuilding work began immediately after the collapse, the south arcade bearing an inscribed date of 1524 at both east and west ends. Those who gave money for the piers of the north arcade are commemorated in inscriptions on the hoodmould stops: merchant John Crossley and his wife; the good wives of Beverley; and the minstrels, five of whom are depicted as statues on corbels against their pier.
The 19th century saw significant restoration undertaken at St. Mary’s, in 1829-30 under William Comins, then under A. W. N. Pugin in 1844-52. E. W. Pugin took over the work, and was followed by Cuthbert Brodrick, George Gilbert Scott (who refitted the nave and chancel), and numerous other architects.