Editing Guido of Arezzo (section)

===Arezzo, Rome and later life===
[[File:Guido e Teodaldo.jpg|thumb|upright=0.8|Guido (left) showing Tedald the [[monochord]], depicted in an 11th-century medieval manuscript]]
Arezzo was without a monastery; Bishop Tedald of Arezzo (Bishop from 1023 to 1036) appointed Guido to oversee the training of singers for the Arezzo Cathedral.{{sfn|Palisca|2001a|loc="1. Life"}} It was at this time that Guido began work on the ''Micrologus'', or in full ''Micrologus de disciplina artis musicae''.{{sfn|''Britannica''|2021}} The work was both commissioned by and dedicated to Tedald.{{sfn|Palisca|2001a|loc="1. Life"}} It was primarily a musical manual for singers and discussed a wide variety of topics, including chant, [[polyphonic music]], the [[monochord]], [[melody]], [[syllable]]s, [[mode (music)|mode]]s, [[organum]], [[neume]]s and many of his teaching methods.{{sfn|Palisca|2001a|loc="2. Writings": "(iii) Micrologus"}} Resuming the same teaching approach as before, Guido lessened the standard 10-year training for the ideal cantor to only one or two years.{{sfn|Ruini|2004}} Italy-wide attention returned to Guido, and Pope John XIX called him to [[Rome]], having either seen or heard of both his ''Regulae rhythmicae'' and innovative staff notation teaching techniques.{{sfn|Palisca|2001a|loc="1. Life"}} Theobald may have helped arrange the visit,{{sfn|''Britannica''|2021}} and in around 1028, Guido traveled there with the [[Canon (priest)|Canon]] Dom Peter of Arezzo as well as the Abbot Grimaldus of Arezzo.{{sfn|Ruini|2004}}{{sfn|Palisca|2001a|loc="1. Life"}}{{refn|Dom Peter of Arezzo was the Prefect of the [[Canon (priest)|Canon]]s at the [[Arezzo Cathedral]].{{sfn|Ruini|2004}}{{sfn|Palisca|2001a|loc="1. Life"}} [[Abbot]] Grimaldus of Arezzo's identity is uncertain; {{harvtxt|Ruini|2004}} suggested that he was "an unknown Grünwald of Germanic origin", while {{harvtxt|Palisca|2001a|loc="1. Life"}} suggested he was an Abbot of Badicroce, which was about 15 [[kilometer]]s south of Arezzo.|group=n}} His presentation incited much interest from the [[clergy]] and the details of his visit are included in the ''Epistola ad Michaelem''.{{sfn|Ruini|2004}}

While in Rome, Guido became sick and the hot summer forced him to leave, with the assurance that he would visit again and give further explanation of his theories.{{sfn|Palisca|2001a|loc="1. Life"}} In the ''Epistola ad Michaelem'', Guido mentions that before leaving, he was approached by the Abbot Guido of Pomposa who regretted his part in Guido's leave from Arezzo and thus invited him to return to the Abbey.{{sfn|Ruini|2004}} Guido of Pomposa's rationale was that he should avoid the cities, as most of their churchmen were accused of [[simony]],{{sfn|Palisca|2001a|loc="1. Life"}} though it remains unknown if Guido chose the Pomposa Abbey as his destination.{{sfn|Ruini|2004}} It seems more likely that around 1029,{{sfn|''Britannica''|2021}} Guido settled in a monastery of the Avellana of the [[Camaldolese order]] near Arezzo, as many of the oldest manuscripts with Guidonian notation are Camaldolese.{{sfn|Palisca|2001a|loc="1. Life"}} The last document pertaining to Guido places him in Arezzo on 20 May 1033;{{sfn|Ruini|2004}} his death is only known to have been sometime after that date.{{sfn|Palisca|2001a|loc="1. Life"}}