Nations
How many architects are restocked each round, and do unused ones carry over?
The rulebook's Architects step returns leftover architects to the supply and places new ones by player count plus the Event card.
Each Maintenance Phase places 0, 1, 2 or 3 architects by player count (1 to 5 players), plus any shown on the Event card. Architects left unused go back to the supply, so unused architects do not carry over.