Polyptych of Irminon

The Polyptych describes the possessions of the monastery, located primarily in the Paris region, between the rivers Seine and Eure.

The Polyptych text is preserved in a ninth-century manuscript, containing 20 quires that describe 25 villages or settlements, and that name more than 10,000 individuals living on these lands.

[1] At least four other quires have been lost, together with almost all of a sister volume listing lands given in benefice.

The repetition of a chapter shows that the Polyptych, in its current form, was produced from a number of working copies, and was written by about a dozen scribes.

The Polyptych seems to have been based on two tours of local enquiry undertaken by monks, each one asking inhabitants a different set of questions in the estates they visited.