KITTERY — The Navy is hosting a forum for developers interested in rehabbing the former prison at Portsmouth Naval Shipyard.

The event at the Regatta Center in Eliot, on Wednesday aims to provide information to those who are interested in a long-term lease that includes restoring the structure.

The effort is the third attempt to bring in the private sector.

Dating back 106 years, the prison features medieval architecture with turrets that give it the appearance of a castle overlooking Portsmouth Harbor and the North Atlantic.

The Navy would have to approve the type of development since there are security concerns. The former prison is located on an active-duty Navy shipyard that overhauls nuclear submarines.