Convention.

http://data.archives-nationales.culture.gouv.fr/instantiation/041444-c1p6uwhp2pw3-1mn1dswpulyx9-i1 an entity of type: Instantiation

Convention. 
xsd:date 1751-09-18 
18 septembre 1751 
MC/ET/XV/698 
Convention. 

data from the linked data cloud