Each primate species has one of those very large green cages and half of the large brown building as the indoor area.
The primate species in this row of enclosures are: Mandrills, Black-and-gold Howlers, Kikuyu Black-and-White Colobus, Javan Lutung, Patas (in a different style of enclosure - open topped pit rather than large cage), Bornean Orangutan, Chimpanzee.
I'm not completely sure which of those species is in this particular one, but I think that may be the Muntjac enclosure behind which would make this the one for Javan Lutungs.
There is viewing on the other side and you can pretty much get right up to the cage on the other side. There is also indoor viewing which is very much essential since Gdansk gets pretty chilly in winter.