The Dormition and Assumption of the Virgin with St. Dominic
Oil on canvas (Dormition) and fresco (Assumption)
Basilica of St. John Lateran, Rome
St. Dominic is the saint rising on the left with the book and stalk of lilies. Lilies are one of his attributes, as of course is the Dominican habit he is wearing.
St. Dominic's book is open to the words Trahe Nos Post Te, from the Song of Solomon 1:4, trahe me post te curremus introduxit me rex in cellaria sua exultabimus et laetabimur in te memores uberum tuorum super vinum recti diligunt te ("Draw me: we will run after thee to the odour of thy ointments. The king hath brought me into his storerooms: we will be glad and rejoice in thee, remembering thy breasts more than wine: the righteous love thee.")
The change from trahe me ("draw me") to trahe nos ("draw us") points to the understanding of the Virgin as not simply the historical Mary but the Church, the Bride of Christ whose nuptials are traditionally understood to have been foretold in the Song of Solomon.
I have not yet identified the saint on the right.
The framed painting to which the second saint is looking is a canvas of the Dormition (see detail), identified at the church as being from the school of Giotto.
More of St. Dominic
More of the Assumption
More of the Dormition
Photographed at the Lateran Basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.