This is unframed. Painted on hard board, not canvas. It is of old town, Warsaw Barbican in winter. 9 inches by 11-3/4". This is not a miniature. Warszawa Barbakan 1990.

I have seen other paintings of this courtyard but different seasons and figures in the painting.  I tried to take pics of the painting so you can see the condition.  There are two pin holes, slightly raised , one in each upper corner. This one is unusual because it's a larger painting than most I have found of Gabriel's. Sold as is. Please look at the pictures for the condition. 

From Gabriel 's web page-

Gabriel Mazurkiewicz, born 1935 in Warsaw. First works dated 1950 (aquapainting). Quick switch to the oil on canvas technique. Specialized in Warsaw architerture painting - inspired by Canaletto. Succesful work on landscape, still nature, portrait, and nude painting. Several hundred works of him have been sold to the United States. An important direction of his work is miniature.