Lucrehulk-class Battleship

The Lucrehulk was an old Clone Wars era vessel used in limited numbers by the Rebel navy as a starfighter carrier.

You can read the Wookiepedia entry here.

Role: Starfighter Carrier, Command Ship, Battleship
Manufacturer: Hoersch-Kessel Drive
Build At: Pammant, former CIS worlds
Size: 3,170 metres
Speed: 20 MGLT 
Hyperdrive: Class 2
Shielding: Unknown
Main Battery: 48 Light Turbolasers
Secondary Weapons: None
Anti-Fighter Weapons:  8 Concussion Missile Launders
Complement: 12 Squadrons of Starfighters (144 Starfighters, X-Wing & Y-Wing)
Availability: Tech Level 0

I currently do not have a model. If you have a model I can use please let me know.