Thank you for submitting your item for appraisal. This apperas to be an adoration of the shepherds or l'adorazione dei pastori painting. The fragmented fragment might date to the 17th century or it is a later 18th century copy. The current desolate condition might be a result of a war. The estimate very much depends on the size and how many fragments there are and if a restoration is possible at all. Currently I would consider it a restoration project, the restoration costs will most likely exceed the current market value.