Annunciation by Rossetti.
Br. Stephen of Sub Tuum has a wonderful post on the Angelus.
"At Spring Bank, as in most Cistercian houses, Lauds, Vespers and Compline end with a hymn to the Virgin. After Lauds, Sext, and Compline, we recite the Angelus silently as the bell tolls three sets of three peals. Originally a set of three Hail Marys, later three petitions were added recalling the Virgin’s answer to the angelic salutation at the Annunciation. Later a concluding versicle and collect were added." - Read more.