Gatchina is actually quite huge.. The rooms of Alex. III were not open yet when I visited in 2006 [?] But they are just a tiny part of the whole. If I can find them, I will post some of the pics I have from that visit. The town itself is a pleasant visit. Much cheaper than St. Petersburg and Pavlosk. And good connections [rail & bus]. It is not the prettiest of palaces of the Romanovs, but still impressive enough to warrant a visit.