  With the edition of many of Marchia’s works thus completed and the remainder in progress, Marchia studies have matured since the first version of this entry was published in early 2001. Six papers on Marchia were presented at the SIEPM congress on medieval philosophy in Porto in 2002, a special issue of Vivarium was devoted to Marchia in 2006 and published as a book (Friedman-Schabel 2006), a monograph on Marchia appeared in 2008 (Folger-Fonfara 2008), and a volume of Tiziana Suarez-Nani’s revised articles on Marchia will appear shortly (Suarez-Nani 2015). The journal Picenum Seraphicum, edited by Roberto Lambertini, continues to be a forum for Marchia studies. Most impressively, with the initiative of the Comune di Appignano del Tronto under the leadership of Domenico Priori, the Centro Studi Francesco d’Appignano was established in Marchia’s hometown in May of 2001 during the First International Conference on Francis of Marchia. With the publication of the proceedings of the sixth such conference in 2014 (Priori 2014), some fifty studies on Marchia by leading scholars have appeared from these venues alone, and the seventh meeting is planned for 2016. Thus around one hundred new studies have appeared dealing with different aspects of Marchia’s thought. Many questions about his works have been settled, but new disagreements have arisen, for example about the relative chronology of the Vat. lat. 943 version of Marchia’s Sentences commentary, the character of the main versions of book IV, the respective dating and nature of the Scriptum and Reportatio on book I, and the authenticity of sermons attributed to him (Friedman-Schabel 2001; Mariani 2002; Friedman 2004; Schabel 2004; Lambertini 2004; Lambertini 2006b; Alliney 2006a; Katsoura-Papamarkou-Schabel 2006–08; Lambertini 2009a; Duba 2014b). There is also significant debate about Marchia’s thought, as will be seen below in the section on natural philosophy.