I was reading a book about St. Francis and there is a mention about a "famous" speech he gave in the piazza of Bologna, the 15th of August of 1222. There are several descriptions around of this speech. For example, this book mentions:
Footnote 69 above mentions this page in Monumenta Germaniae Historica. The key passage is:
I haven't however found the original sermon. This blog entry seems to incorrectly state that the above document contains the full sermon.
Anyone aware of where can such sermon be found?