The Council of Prague is the third gathering of the Fellowship of Ethereum Magicians. It is being held before Devcon 4.
Unlike Berlin, the core will not only be unconference style. Ring Makers and EIP authors will be invited to set aside chunks of time (2 – 3 hours) to work together in moving issues forward. This also is very specifically different than content at DevCon – we gather to make progress on EIPs/ERCs. This may be pair programming, plugfests for interoperability testing, whiteboarding, circle discussions, or anything else that moves towards running code and rough consensus.