Multiple choice general knowledge In which room was the Stone Pyramid hidden by Peter Solomon in the US Capitol? HB XIII SB XIII SBB XIII IIIX 885 Reveal answer Fill a bubble to check yourself C Correct answer Explanation In 'The Lost Symbol', Peter Solomon hides the stone pyramid in room SBB XIII (Sub-Basement 13) of the US Capitol. This is where the key discoveries are made. HB, SB, and IIIX 885 are incorrect room designations from the novel.