On their return to Russia, they settled into a 200-room palace (the former Baryatinsky mansion) at 46 Sergievskaya Street (present-day ) in Saint Petersburg. (The palace, a gift from Tsar Nicholas II to his sister, now houses the Saint Petersburg Chamber of Commerce and Industry.) Olga and Peter had separate bedrooms at opposite ends of the building, and the Grand Duchess had her own art studio. Unhappy in her marriage, she fell into bouts of depression that caused her to lose her hair, forcing her to wear a wig. It took two years for her hair to regrow.