documentation drawn up later might have its contents or dates changed to suit current purposes. The charter was part of a system of defensive pacts among the polities that later became the Swiss cantons. They include the following, also on display at the Museum of the Swiss Charters of Confederation: 1315: Federal Charter of Uri, Schwyz and Unterwalden 9 December 1315 (aka Pact of Brunnen) 1332: Charter of the City of Lucerne with Uri, Schwyz and Unterwalden 1352: Charter with Glarus 1352: Charter with Zug 1451: Contract with St. Gallen Abbey and Zürich, Lucerne and Schwyz and Glarus 1454: Eternal Contract for St. Gallen with Zürich, Bern, Lucerne and Schwyz, Zug and Glarus 1464: Contract of Rapperswil with the abovementioned 1481: Contract of Freiburg und Solothurn 1501: Contract with Basel of which the number of copies is known to be 11, corresponding to the 11 seals. 1501: Contract with Schaffhausen 1513: Contract with Appenzell Modern reception The charter of 1291 became important in the historiography of Switzerland only in the late 19th century. Previously, the date of the foundation of the Confederacy was traditionally given as 1307 (Aegidius Tschudi); this is still the year inscribed on the Tell Monument, commissioned in 1895. The idea of the charter of 1291 representing the founding document of the Confederacy was first suggested in a report by the Federal Department of Home Affairs of 21 November 1889, in the context of a proposed combined celebration of the 700th anniversary of the foundation of Bern and the 600th anniversary of the Confederacy in 1891. Celebration of a national holiday on 1 August based on the date on the document was first suggested in 1899 (although it was introduced officially only in 1994). The idea to build a dedicated national monument housing the foundational documents of the Confederacy was first proposed in 1891 by federal councillors Emil Welti and Carl Schenk. This plan was revisited in 1915 during the preparation of the 600th anniversary celebration for the Battle of Morgarten, but its realisation was delayed due to World War I. After the war, the canton of Schwyz requested federal support for the project, which was granted in 1928. Designed by Joseph Beeler in 1933, the Bundesbriefarchiv (Federal Charter Archive) was opened in 1936. In 1979/80, the exhibition hall was renovated, and restoration work was carried out on the 21 banners and flags displayed in the museum.