Two paintings

[Irina S]

On the back of the first image - A. Celesti - that is, Andrea Celesti ( 1637 - 1712) . Capella della Madonna della Pace
On the back of the second - A. Molinari - that is, Antonio Molinari ( 1655 - 1704) . Pieta
Given the fact that they have signed an absolutely identical handwriting and executed on paper + sign Acad. D2. (maybe some kind of Academy of Arts and inventory designation ? ? ), I would suggest that this is some kind of educational materials (or student work ), which represent the product of these two Italian masters of the Baroque period .