Providence Weyr is an alternative universe Weyr set in the Eighth Interval and Ninth Pass of Anne McCaffrey’s Pern. In this version of Pern, the events of Dragonflight happened exactly as they did in the book, but with one exception – in addition to Lessa leading the Five Weyrs forward through time, they came up with a Plan B. The Five Weyrs, the Harpercraft, the Seacraft and the Lord of Ruatha combined their resources to found an additional Weyr which would exist in parallel with Benden, but remain unknown to it until the return of Thread. That 'secret' Weyr was Providence Weyr, founded on a Thread-ravaged island, far, far out in the Western Sea.
The main purpose of the Providence Weyr LJ community is for members to write stories and articles about our own specific version of Pern. The span of time we cover in Providence is about 450 Turns, so there is lots of scope to find an era you like, or where your characters and plot ideas will fit.
We are not, however, a role-play group. There are plenty of those out there if RP is what you are after. Ask on the Dragonriders of Pern fanfic community and I’m sure they’ll point you at a few.