In the middle ages, curia referred to the royal court or papal court, specifically to those who attend the needs of the ruler or the pope and helped with the running of the area. It was later used in law courts but it was always connected to bureaucracy.
In Avacal, Curia is the business meeting where officers provide reports and financial and other decisions are made or announced. It is usually held at kingdom events and attended by Their Royal Majesties and officers. Everyone else is encouraged to attend as well.
Curia minutes can be read on seneschal's page.