Classicist painting with a musician angel playing harp and a landscape on the foreground . It  was executed on the turn of 19th century and despite the lack of signature have all criteria (style, composition and time of creation) to be atteibuted   to the hand of famous Austrian Pinter, etcher and miniature artist Karl Joseph Aloys Agricola (1759 Säckingen - 1852 Vienna).
For comparison with other works by Agricola see our last 4 additionally images.

He was a student of Friedrich Heinrich Füger, Hubert Maurer, and Franz Caspar Sambach. After initial studies at the Karlsruhe Academy, Agricola became a student at the Vienna Academy in 1793 and a member in 1836. He lived in Vienna until his death in 1852 and was renowned under high society and royals  for his works with angels and miniatures.

For comparison see additionally images of few Agricola's works.

Works: Madonna (Hofmuseum Vienna); Amor an Psyche ; Boreas entführt Oreithya ( both in the Fine Arts Academy, Vienna).

Literature: artist lexicons by ThIeme/Becker; Fuchs; Saur.

Inscription: unsigned.

Technique: oil on cardboard, original period gilt frame.

Measurwments: unframed 11 3/4" x 10 5/8" (32,5 x 27 cm), framed 16 1/8" x 13 5/8" (41 x 34,5 cm).

Condition: very good.