L2 Clan Halls

Lineage 2 there are 3 types of Clan Halls.

1) Auction Clan Halls.

Those you bid for as and when they are available and you keep them so long as your clan warehouse has enough adena init to pay for the weekly maintenance of the clan hall. All clan halls in towns are auction type.

2) Contestable Clan Halls.

Those you have to fight over every 2 weeks. You win the fight, you get the clan hall for 2 weeks after 2 weeks pass the clan hall is available for everybody to fight over and get. Clan halls outside towns are war type ie :

- Fortress of Resistance

- Bandit Stronghold

- Devastated Castle

- Wild Beast Reserve

- Fortress of the Dead

- Rainbow Springs Chateau

3) Provisional Clan Halls.

Instanced Provisional Clan Halls. These Provisional Clan Halls allow many Clans who could not otherwise own a Clan Hall the opportunity to experience the community and benefits of owning one. Provisional Clan Halls are auctioned every two weeks, and once won, are owned for four weeks. They then go up for auction again among the Clans that want to bid and that do not already own another type of Clan Hall.

Ref : http://www.lineage2.com/en/game/the-library/clans/clan-halls.php