Victoria and Albert Museum

The Victoria and Albert Museum (often abbreviated as the V&A) in London is the world's largest museum of applied and decorative arts and design, as well as sculpture, housing a permanent collection of over 2.27 million objects.[4] It was founded in 1852 and named after Queen Victoria and Prince Albert.

The museum houses the Isfahan Cope: http://collections.vam.ac.uk/item/O93501/the-isfahan-cope-cope-unknown/

And many other pieces by or related to Armenians:

http://collections.vam.ac.uk/search/?listing_type=&offset=0&limit=15&narrow=&extrasearch=&q=armenian&commit=Search&quality=0&objectnamesearch=&placesearch=&after=&before=&namesearch=&materialsearch=&mnsearch=&locationsearch=