This is perhaps the best collection in NYC. Beyond...

This is perhaps the best collection in NYC. Beyond world class. There are bigger, more famous, and more aggressively promoted museums, but none better.
There exists in art appreciation/education etc,. what I would call the 'Vatican Syndrome'. Wonderful, huge, diverse and vitally important institutions such as The Met nearby; The British, The Louvre; Berlin's Museum Island - on and on. Opportunities for scholarship, important archives. But perhaps a bit overwhelming to the general, if savvy, public. Frick Collection is dedicated to education and outreach in addition to scholarship and research; but this is fine art on a human, personal scale.

The fact that this is one of very few venues which will host this unique and fascinating exhibit away from Auckland Castle (County Durham, England, UK) speaks volumes.

There are two exceedingly well done videos which run in rep in the theatre, accompanied by a useful overview of Henry Clay Frick and the house; the legacy.
I must also comment upon the extreme helpfulness and courtesy of the staff. I witnessed three episodes of patron indiscretion. One photo opportunity (verboten except in the delightful atrium), one backpack warning, and a somewhat annoying mobile phone distraction. From personal experience, I may tell you that many minders respond with far less courtesy and restraint, to the point where the reaction is far more vexing than the deed. The phrase "come unglued' might spring to mind.
Class. Lots and lots of class.
Audio guides are very worthwhile, and gratis; a photo ID is required and will be taken hostage.