Watch List notes:

CAROLINGIANS. Louis 'le Pieux' (the Pious). As Emperor Louis I, 814-840. AR Denier (21mm, 1.67 g, 5h). Class 3. Unspecified mint. Struck 822-840. + HLVDOVVICVS IMP, cross pattée; pellets in quarters / + +PISTIΛNΛ RELIGIO, temple façade. Coupland, Money –; Depeyrot 1179; M&G 472; cf. MEC 1, 794 and 800 (for type). VF, toned.

Ex UBS 73 (5 September 2007), lot 526.