Gallery HD was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 arts-themed network that broadcast exclusively in High definition

High-definition television

High-definition television is video that has resolution substantially higher than that of traditional television systems . HDTV has one or two million pixels per frame, roughly five times that of SD...

. Programming included original series and tours of various galleries and museums. It was one of the Voom HD Networks, a division of Rainbow Media

Rainbow Media

AMC Networks is an entertainment company in the United States that owns the national cable channels AMC, IFC, WE tv, and Sundance Channel; the regional News 12 Networks, the art house movie theater IFC Center in New York, New York, and the film company IFC Films.The company was originally launched...

. It's Canadian version Treasure HD

Treasure HD

Treasure HD was an American high-definition television channel that focused on the world of Collecting. Programming catered to those who are active collectors of anything from antiques and jewellery to art and cars. It also featured live coverage of sales from various auction houses...

 also broadcasts exclusively in High Definition.

The channels host a variety of arts and culture related programs such as Artstar

Artstar

Artstar is an unscripted reality television series set in the New York art world, considered to be the first in the visual arts. Selected from an open call of over 400 applicants, eight artists participate in a group exhibition at Deitch Projects with the opportunity for a solo exhibition as well...

and Art in Progress.