The Pontifical of Gilles de Luxembourg in now in the Pierpont Morgan Museum. It was made in Châlons-sur-Marnes in ca. 1503. Made for Giles of Luxembourg (bishop 1503; d. 10 February 1535) bishop and count of Châlons-sur-Marne, perhaps for his consecration in 1503 (Luxembourg arms on folio 01 surmounted by an episcopal crozier) .
Folio 01r illustrates the Ordination of an acolyte in the miniature. Tonsured acolytes, wearing hooded robes, kneel with joined hands raised before Bishop, wearing miter and cope, holding right thumb to forehead of one of the acolytes. Standing behind him and holding his cope is another acolyte, possibly tonsured, wearing hooded robe, holding cross-staff (?) in right hand. Scene in interior, with wall hangings with pseudo-inscription, leaded-glass windows, and statues in wall niches.
Margins with vinescroll and floreate ornament, inhabited by birds. In lower margin is escutcheon with arms of Giles of Luxembourg, surmounted by a crozier . In the lower-right hand border a dextral snail can be seen.
The snail is stylised but appears to have a thickened apertural lip.
 PMM, M. 1098, 69 ff. [corsair.themorgan.org, search ‘snail’, #8].