in the centre of the church , between the two transepts , is the cross-legged effigy of a knight in armour carved in durham and representing henry fitzhugh , a descendant of the earls of richmond and a major benefactor buried in 1307 , whilst in the nave stands a stone inscribed t. dunwell cuno ' sci leonardi ebor the cistercians themselves were founded in 1098 by robert , an abbot from moline in burgundy , with the first statutes being drawn up in 1100 .