This model was created by Mieszko Lacinski (@mieszkolacinski) and it is not my property. Make sure to check the creator's profile on this link and tip him to show your appreciation!
Orthanc was the black impenetrable tower of Isengard built by the Dúnedain. By the Great Years and the War of the Ring it was possessed by the wizard Saruman. It stood in the centre of the Ring of Isengard, great defensive walls fortified by the early Gondorians.