The first depicts Our Lord's Ascension,
and the second shows Our Lady's Assumption.
I found these pictures in a little book called "The Rosary of Pope John Paul II:
The 20 Mysteries." I then looked for them online.
This book is also where I found this picture which I blogged about on January 14th.
I've since learned that the artist referred to as Tiziano Vecellio in the book is better
known, in English, as Titian.