The Registers of Pope Innocent III for 1199 to 1201

The pope's outgoing letters for the year, in his chancery's own copy, touching nearly every realm in the atlas. For 1200 they include the orders behind the French interdict and its lifting, letters to John and Philip pressing peace, the long exchange with the German princes over Otto and Philip of Swabia, the crusade preparations and the fortieth, the Sicilian regency and Markward, the Leonese marriage and the interdict on Leon, Portugal's tribute, Sverre's Norway under ban, Denmark and Ingeborg, Hungary's warring brothers, Vukan of Serbia and Kaloyan of Bulgaria, Alexios III in Constantinople, Armenia and Antioch, Cyprus, the Livonian mission, Poland, Scotland's bishops, Gerald's St Davids case, Ireland, and dozens of monasteries. Each letter is dated by place and day, so the register is also the calendar of what Rome knew and when.

About this source

Title: Regestorum sive epistolarum libri II et III (Die Register Innocenz' III., Pontifikatsjahre 2 and 3)
Author: Innocent III and the papal chancery
Author's dates: Innocent III, pope 8 January 1198 to 16 July 1216
Written: 22 February 1199 to 21 February 1201
Language: Latin
Covers: the second and third pontifical years, 1199 to 1201
Kind: Register

The Vienna edition (Hageneder) is standard and under copyright. The Documenta Catholica Omnia link was taken from the Wikipedia article's external links; the site refuses automated fetching, so the page could not be opened directly here. The Internet Archive scan of Potthast vol. 1 is noted on its page as a Google digitisation with some missing pages. The register for the third year has gaps where the original roll was damaged.

Where to read it

Editions

O. Hageneder and others (eds), Die Register Innocenz' III., vol. 2, 2. Pontifikatsjahr 1199/1200 (1979), and vol. 3, 3. Pontifikatsjahr 1200/1201 (1993), not free (not freely online)
J.-P. Migne (ed.), Patrologia Latina 214 (1855), Innocentii III Regestorum libri we to III, the older complete text; Documenta Catholica Omnia index of the PL volumes for Innocent III
A. Potthast, Regesta pontificum Romanorum, vol. 1 (1874), calendar of the letters with dates

Translations

C. R. Cheney and W. H. Semple, Selected Letters of Pope Innocent III concerning England, 1198 to 1216 (1953), English, not free (not freely online)
Letters of 1198 to 1201 on papal policy and the interdict of France, from Thatcher and McNeal (1905), English, at the Fordham Medieval Sourcebook

Read it online

About the source

Wikipedia: Pope Innocent III