Watch List notes:

CAROLINGIANS. Louis 'le Pieux' (the Pious). As Emperor Louis I, 814-840. AR Denier (20mm, 1.58 g, 3h). Class 3. Uncertain mint. Struck 822-840. Cross pattée; pellets in quarters / Temple façade. Depeyrot 1179; M&G 472; cf. MEC 1, 794 and 800 (for type). Good VF, dark toning, nice metal.