The Angkor National Museum, is located on Charles de Gaulle Avenue also known as Preah Sihanouk Avenue in Siem Reap, Cambodia.
The main galleries focus on the art and culture of the Khmer civilization, with collections mainly dated from the Khmer Empire‘s Angkor period circa 9th to 14th-century. So they contain examples from the earlier Hindu period as well as later Buddhist ones.

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See also their website:
https://angkornationalmuseum.com
and
https://en.wikipedia.org/wiki/Angkor_National_Museum
The wikipedia page wrongly states that the museum has a strict no-photos policy. This is out of date, you may, as I did, take photos but flash photography is forbidden.