While featuring bold scenes (BDSM, orgies) that risked pornography accusations in 1969, it is generally considered art-erotica rather than hard-core.
If you would like to explore this further, I can find information on: The specific composed by Piero Piccioni. More details on director Radley Metzger's other films. Where to stream or buy the restored version. Overlooked & Underseen: Camille 2000 (1969) Camille 2000HD
Based on the search results, Camille 2000 (1969) is an erotic drama film directed by Radley Metzger, known for its stylized aesthetic and bold content for its time. While featuring bold scenes (BDSM, orgies) that risked