sentences:  The slow transformation from fortified house to palace ("Illustration 7") began during this era, first with building by Lamberto Grimaldi, Lord of Monaco (who between 1458 and 1494 was "a noteworthy ruler who handled diplomacy and the sword with equal talent"), and then by his son Jean II.This period saw the extension of the east side of the fortress with a three–floored wing, guarded by high scalloped walls connecting the bastion towers—St Mary (M in "Illustration 7"), Middle (K) and South (H).This large new wing contained the palace's principal room, the State Hall (today known as the Guard Room).