Mia N. Weiner has been in the business of selling old master drawings and oil sketches since 1979 and has regularly held exhibitions in New York since then. She was the forerunner in America of private old master drawings dealers and the first to publish a comprehensive web site of Old Master Drawings. Until 1994 she mounted exhibitions in her private New York gallery, sometimes theme orientated such as Regarding the Antique as well as Emilian Drawings 16th - 18th Century, the latter coinciding with a paintings exhibition of the same subject at the Metropolitan Museum. She has participated in a number of international fairs since 1990, in New York, London and Parma. Several of these fairs she helped to organize; many times she served on their vetting committees. She also served for a number of years on the board of the Art & Antique Dealers League of America. Presently she exhibits every January as part of Master Drawings in New York. In Spring 2015, Ms. Weiner opened a gallery called Pinacoteca in Bantam (Litchfield), CT. There she hoped to introduce to a new public the beauty and intrigue of old master drawings as well as showing 19th and early 20th century oil sketches and paintings, specializing always in Italian works and European artists working in Italy. 

Included among Ms. Weiner's clients are European and American Museums as well as private collectors. Her first significant discovery was acquired by the British Museum in 1979. Many subsequent discoveries have been placed in comparable institutions as well as prominent university museums. In the last decade, Neapolitan and Florentine paintings and drawings of the 19th and 20th centuries have been of particular interest, studied and acquired. It is these and more that are the specialty of Pinacoteca.