It's currently closed for renovation and set to reopen in November but if you have a chance to go see the Frick Collection in New York, I strongly recommend it for two of the most photorealistic paintings I've ever seen: the portraits of Sir Thomas More [1] and Thomas Cromwell [2] by Hans Holbein the Younger (sadly the digitized versions are low resolution and don't do them justice).
The paintings are 500 years old but look like photographic portraits, down to the individual hairs in the stubble on More's chin. Realism was in vogue at the time but there weren't many other artists who were as good as Hans Holbein.
Thats an obsessive level of detail for that era. Later Rembrandt's school were focusing more on the play of shadows on given subject and its surroundings, but most of the details were not to this level, at least not those I've seen up close (but still some parts were pretty crazy, ie embroidered collar or vein structure of wrinkled skin of an old woman).
The paintings are 500 years old but look like photographic portraits, down to the individual hairs in the stubble on More's chin. Realism was in vogue at the time but there weren't many other artists who were as good as Hans Holbein.
[1] https://collections.frick.org/objects/100/sir-thomas-more
[2] https://collections.frick.org/objects/101/thomas-cromwell