The Capitol Rotunda and the Capitol Grounds have been used as the setting for a variety of events, ranging from memorial ceremonies and the reception of foreign dignitaries to the presentation of awards and the hosting of public competitions. This report identifies and categorizes uses of the Capitol Rotunda and Capitol Grounds authorized by concurrent resolutions since the 101st Congress. In most cases, use of the Capitol Rotunda requires a concurrent resolution agreed to by both the House and Senate. A concurrent resolution for the use of the Rotunda typically identifies the event and date for which use is authorized. Often, the resolution also directs physical preparations to be carried out under the supervision of the Architect of the Capitol. Ninety concurrent resolutions were agreed to by the House and the Senate authorizing the use of the Rotunda between the 101st and the 113th Congresses. These resolutions can be divided into seven categories: (1) commemoration ceremonies; (2) Congressional Gold Medal ceremonies; (3) artwork unveilings; (4) presidential inauguration activities; (5) receptions or ceremonies honoring living people; (6) persons lying in state or honor; and (7) prayer vigils. Use of the Capitol Grounds can be authorized either by the passage of a concurrent resolution or through an application process with the Capitol Police. A concurrent resolution is typically needed for events longer than 24 hours in duration, for events that require vehicles on the Capitol Grounds for setup, for events requiring electronics on the Lower West Terrace of the Capitol, and for events where a large number of Members will be in attendance. The Capitol Police's special events office handles permits and approval for all other events. Ninety-seven concurrent resolutions were agreed to by the House and the Senate authorizing the use of the Capitol Grounds between the 101st and the 113th Congresses. These resolutions can be divided into four categories: (1) events sponsored by nonfederal government groups; (2) memorial services; (3) events sponsored by the federal government; and (4) award and dedication ceremonies.