A theme is a blankmusical idea

The artist is fra angelico

∵they depict sad lonely people  ∵  figures in them have long limbs and faces, similiar in style to paintings by el greco.

The technique was mural painting and he used either freshly laid or wet lined plaster. he also use water to merge it with the pigment and plaster creating a internal part of the wall

Ibelieve it is called classical  sculpture