Logo Cauldron – The OSR Euro Con

October 27–29, 2023

Schloss Hohenroda
Hessen, Germany
(~ 1h from Frankfurt a. M.)


The project group ESA of the non-profit association for the promotion of fantastic culture Nexus e. V. invites you to Cauldron 2023 – our first OSR Euro Con! From October 27th to 29th we will meet at Schloss Hohenroda, near Frankfurt am Main, for a weekend full of games, socializing and exchange.

What You Can Expect

  • A weekend full of old-school game rounds by and with authors of the DIY scene
  • Hearty regional catering as well as lamb from the grill, suckling pig and more
  • Auction & author booth
  • Prizes for best DMs and best players
  • ADDKON-compatible rounds
  • Chainmail tabletop battles
  • Shuttle service from Fulda to Hohenroda


We remain true to the Berlin system of the founding fathers of Nexus: all game rounds begin and end at the same time. Between the game round blocks are breaks, where food intake and smaller program points can take place.

Friday, Oct 27 2023
Until 6:00 pmArrival
6:00 to 8:00 pmDinner
8:00 pm to 12:00 amBlock I
From 12:00 amNight Block I
Saturday, Oct 28 2023
7:00 to 8:00 amEarly morning walk
8:00 to 9:00 amBreakfast
9:00 am to 1:00 pmBlock II
1:00 to 3:00 pmLunch
3:00 to 7:00 pmBlock III
7:00 to 9:00 pmDinner & Auction
From 9:00 pmNight Block II
Sunday, Oct 29 2023
8:30 am to 12:30 pmBlock IV incl. Brunch
From 12:30 pmAward ceremony & farewell

The blocks are usually four hours long and encourage small, self-contained rounds of games and missions. There is no pre-registration for players – the game rounds are posted one hour before the start of the block, and registration takes place on site.


Our Mission

Cauldron is all about old-school roleplaying – or to be precise: about the first edition of AD&D (Advanced Dungeons & Dragons, the successor and predecessor of D&D). This includes the various clones, replicas and adaptations.

This means that characters can be transferred and used across different game rounds.

AD&D allows for a wide range of play styles and adventures, all of which we would like to experience at the con. We are therefore especially looking forward to your registration as game masters! Whether you bring your own world, self-made dungeons and adventures, or a classic module you’ve always wanted to DM – everything is welcome!


The registration for Cauldron is done via the external tool EasyCon. By clicking on the button you will be redirected to the registration page.

Note: We are fully booked, but you can still sign up for the waiting list.

Note: If you do not receive an email from EasyCon after registering, please check your spam folder.