. >> rose: for the guests to have thtohave -- for the guestse czars. this is the room of the most important painting in our collection. >> rose: has any other leader done as much for art as catherine in. >> well, it's difficult to compare. she was certainly in competition with louie the great but she has done more and managed better than he. also, he had another trick. she was buying the best collections. she bought collections from paris, from the prime minister of britain, his collection. she knew to just buy the best. >> rose: she must have had a group of people that informed her. >> she had some friends, intellectuals who advised her. she had russian diplomats who knew what she liked. she also had dealers, friends. so she had a lot of advice. >> rose: about quality and price. >> quality and price. >> rose: this? one to have the first paintings done -- one of the first paintings done by teeshen. this is scientific, always with the x-rays. just to clean up to paint. >> rose: one treasure after another, isn't it? >> yes. well, this is the problem. thi