Large liturgical book (collection of Gregorian chants) called Antiphonary*, leather cover and brass rivets, from the 17th century.
This book is in its original state, quite damaged.
Please note: damaged leather cover and binding, some tears and yellowing of the paper, see photos.
The antiphonary (from: antiphona, "antienne", refrain of a psalm), is a Catholic liturgical book bringing together the Gregorian scores of the canonical hours.