Ηouse Rаven

House Raven is the largest of the Knight Houses, with many hundreds of Imperial Knights at its disposal. 
The great arsenal of Knights held by House Raven is unmatched. 

House Raven has a long and proud history serving the Imperium, and has fought in countless conflicts from the heart of the galaxy to the stellar wilderness of the outer rim. Lord Grevan Raven, fourth of his name, is the Iron Duke of Kolossi and sits upon the Adamantium Throne of the Keep Inviolate, greatest of the knightly fortresses and capital city of House Raven's homeworld. It is his honour to command hundreds of Knights in battle, as well as dozens of Lords drawn from some of the finest lineages in the Ultima Segmentum.