What is the Antonioni film about the great gay?

In article what was silent Marietta Shahinian? has the following lines:

NP: And that Lenin?

AK: He remained to the end of his days, a homosexual. Incidentally, it is known worldwide, only the Soviet people knew nothing and live in reverent worship of the leader of the proletariat. In Antonioni's film about the great homosexuals, and Lenin it has a special Chapter. This has been written several books.

Suffered from Lenin or not subsequently by their orientation, we can't say, but in my childhood it for him, too, was a difficult challenge: he grew angry, hate the whole world. In high school he took out his evil on the peers, fought, beat their adversaries, for all that it is, of course, was a very talented man.

The question is: what is the Antonioni film about the great gay?