In Capital, players jointly build Warsaw over six epochs, from when Warsaw first became the capital at the end of the 16th century through modern times. Each player creates their own district of the city. At the end of each of the six epochs, districts give income and victory points to their owners. After six rounds, whoever has the most points wins.
In more detail, each epoch consists of a construction phase and an income phase, with wars at the end of the third and fourth epochs. During the construction phase of an epoch, players shuffle the city tiles with the current epoch's number, then deal several tiles to each player. Each player chooses one of the tiles, then places it face down onto the table. All players simultaneously reveal their selected tiles, and each player chooses one of two possible actions.
Instead of placing a tile on an empty space, a player may choose to build on top of an existing tile. Simply place the new tile directly onto an existing tile, covering it completely. As a result, the new tile's price is reduced by the price of the older tile that it covers. A player's district can never be larger than a 3×4 or 4×3 rectangle of tiles. Each city tile is divided into four quarters, and each quarter has its own type of building, so a tile can have 1-4 different kinds of buildings. Public buildings and milestones are always separate individual areas, even if they are adjacent to each other. They also occupy an entire tile.
During the income phase, milestones are placed, and players receive coins and victory points.