About us

To know more on the historical background and the vision of Cosner Galleries of Montreal.

Cosner Art Gallery historic 

Robert Tremblay, owner of the Cosner Gallery began his career 30 years ago. At the time, the company was specialized in the sale and purchase of Canadian and Quebec antiques. Over time, Mr. Tremblay was able to improve his knowledge in the Canadian visual arts, hence becoming an expert in the field.  For many years, he was chairman and auctioneer of the l’Hôtel des Ventes Universelles, the ancestory company of Cosner Auction. The auctions were first held at the Capitole de Québec and the Ritz-Carlton Montreal, for many years to follow they took place in the ballrooms of the Windsor Hotel in Montreal.

Since 2011 Cosner Auction became the Cosner Art Gallery with the main focus of selling and buying Canadian art. Located in prime locations of downtown Montreal, the gallerie present works by Quebec and Canadian artists from private collections and estates. Giving our clients the chance to see and purchase unique paintings that have long been hidden from the public.

June 2016, Galerie Cosner inaugurated a second gallery in the prestigious Ritz-Carlton Hotel Montreal. Respecting the highest standards associated with this monument, this art gallery offers a remarkable selection of artworks by Canadian masters.

Our mission and vision

Our desire is to inform, guide and create a bond of trust between collectors and galleries. The management of a collection of paintings can be hazardous, that is why our team is present both for the acquisition of works of art, the evaluation and an accompaniment when it is time to dispose of them.

Our role is to help the customer find the right work of art whether it is a first acquisition or to complete a collection without the pressure that another client is bidding. It is thus assured to find a high quality of paintings available. A gallery's commitment to its client is to help them make an informed choice. The collection thus built over time is in the image of the customer and can thus have an aesthetic, historical and complementary sense.

Our Team

Cosner gallery's team of experts will assist you in the sales, purchases or evaluations of artwork. Whether you are a leading collector or a client looking to purchase art, the team members will be more than happy to guide you.

Robert Tremblay

Robert Tremblay

Owner, President and Fine Art Appraiser

Founder of the Galleries Cosner, with more than 30 years experience in the industry. Canadian art specialist, Mr. Tremblay is the consultant in appraisals and acquisition of Canadian and International art for the galleries. His field of expertise is vast and include Canadian art, collectibles, decorative art and antiques. What makes him, the reference in the regulation of estate and evaluation of personal and corporate collection.

To join him :




Sophie Ouellet

Sophie Ouellet

Gallery Director, Canadian Art Specialist and Fine Art Appraiser , ISA

International Society of Appraisers (ISA)- Canadian Chapter

A graduate in business administration, Ms. Ouellet has been the director of Cosner Art Galleries for more than 15 years. She is a manager and specialist of 20th century Canadian art. She oversees the team in all activities of buying, selling and evaluating personal and corporate collections. Sophie's also in charge of the business development for Cosner Gallery. She also enjoy to assist art lovers in their collection management and accompanies them in the acquisition or resale of paintings.



Sophie's profile on ISA Canadian Chapter portal: https://www.isa-appraisers.ca/appraiser/sophie-ouellet/

Sophie  Poirier

Sophie Poirier

Acquisitions Advisor

With a Bachelor's degree in Visual and Media Arts from Laval University, Sophie is the acquisition advisor in Canadian art for our collectors. As a painter herself, she will be able to demystify to art lovers the techniques and approaches of our great Canadian masters. She also assists galleries in the sale, evaluation and recording of paintings.

Colette Delwasse

Colette Delwasse

Administration and accounting

With her formidable efficiency, nothing escapes to her vigilance! Her long experience in galleries is invaluable to us both for his professional and personal advices. 

Bryan Harvey

Bryan Harvey

Service and Logistic

The Cosner Gallery family is growing with Bryan. Logistics and maintenance are his business! Between delivery and handling, he is the one who meets the needs of collectors and consignees. And this, while learning the ropes.

Émie  Thériault

Émie Thériault

Imaging, client-service

Émie, a graduated actress performing at the Montreal Conservatory of Dramatic Art, has recently arrived at the Cosner Art Galleries. The team is delighted to count on his artistic and innovative vision for the gallery's activities. Émie is the videographer and manages the digital imaging of the collections. She actively participates in the gallery's operational activities and advises collectors regarding acquisitions.

The Art Galleries

The Cosner Art galleries offer a wide selection of important canadian art. Visit us at our gallery on Maisonneuve O. or at the Ritz-Carlton Hotel Montreal.

Cosner Art Gallery - Montreal

20th Century Canadian Art Gallery. Leader in the acquisition of works of art from private collections. We appraise, consign to our galleries and purchase paintings from estates.


Specialists in the purchase, sale, and appraisal of Canadian paintings. The gallery offers a wide range of works by painters such as Marc-Aurèle Fortin, Jean-Paul Lemieux, Jean-Paul Riopelle and other Canadian and Quebec artists. Our team is available to purchase paintings from collections and estate.


Cosner Art Gallery - Montreal Cosner Art Gallery - Montreal Cosner Art Gallery - Montreal Cosner Art Gallery - Montreal

Galerie Cosner au Ritz-Carlton Montréal

An exceptional exhibition space for paintings by renowned Canadian artists, located on Sherbrooke Street West in the heart of the Ritz-Carlton, Montreal. Works of art by Marc-Aurèle Fortin, alongside paintings by A.Y. Jackson and Jean-Paul Riopelle. The Cosner Gallery is the place of choice for the sale, purchase, and evaluation of paintings.

Consult our inspirational catalogue of 2024 works of art

Galerie Cosner au Ritz-Carlton Montréal Galerie Cosner au Ritz-Carlton Montréal Galerie Cosner au Ritz-Carlton Montréal Galerie Cosner au Ritz-Carlton Montréal