Stuttgart HB.I.55 was used at the Abbey of Weingarten, a Benedictine house in Wuerttemberg, Germany. Although it was originally founded some time after the year 934 as a house for women religious, the nuns of Weingarten moved to Altomuenster in Freising in 1056, and the monks of Altomuenster moved to Weingarten. Under Welf IV and his wife Judith, Weingarten became an imperial abbey; and after 1088 it followed the customs of Hirsau. The abbey was suppressed in 1803 and restored in 1922. The contents of Stuttgart HB.I.55 are misbound: the table below indicates their correct sequence. 5r-5v: Advent I 2r-3v: Advent I to Advent II 6r-7v: Advent II to Advent III 4r-4v: Advent III lacuna 8r-15v: Lucy to Christmas lacuna 16r-21v: John the Evangelist to Epiphany lacuna 22r-84v: Epiphany to Easter Monday 86r-100v: Easter Monday to Ascension 85r-85v: Ascension 101r-126v: Pentecost to Laurence lacuna 127r-190v: Assumption to Benedict In addition to being misbound and having four lacunae, the manuscript contains two leaves (55 and 157) that have numbers that are repeated on the leaves that follow them: there are two leaves marked 55 and two marked 157. In each instance the recto of the second of the pair of leaves is referred to in the index not as "r" but as "w"; and "x" is used in place of "v" for the verso. This enables them to be distinguished from the leaves that precede them; and when the file is sorted on folio number (including "r," "v," "w," and "x,") the order of folios in the source is preserved. The manuscript is notated in non-diastematic neumes, which makes the identification of mode difficult in many instances. Wherever possible the series of neumes used to notate the verses of responsories have been matched with modal formulas, and the modes of those responsories thus identified. It has also been possible to identify the modes of many antiphons in the index. The manuscript employs two different systems for specifying differentiae: neumes and tonary letters. The neumes appear in the outer margins of the openings, the tonary letters in the inner margins. The index records the tonary letter or letters (if present) in an "extra" field to reflect what appears to be signified by the differentiae given in neumes. These designations are based on the incomplete tonary at the end of the manuscript; tonary letters have been assigned arbitrarily to the differentiae of the first three modes.
Stuttgart HB.I.55 contains several CAO Offices that are known in relatively limited regions (i.e., Gregory, Mary Magdalene, Afra, and Gall) but contains only two Offices not found in CAO, those for King Oswald and Benedict. The text of the former is edited in Analecta hymnica, vol. 13, pp. 209-12, and the text of the latter is also in Analecta hymnica vol. 25, pp. 145-9.
All chants not found in CAO have been assigned an arbitrary number prefixed by "wei".
- Autenrieth, J. et al. Die Handschriften der Wuerttembergischen Landesbibliothek Stuttgart. 2nd series, i/1. Wiesbaden: 1968. (See p. 85). Heckenbach, Willibrord. "Das mittelalterlichen Reimoffizium `Praeclarum late' zu den Festen das Heiligen Benedict." In Itinera Domini: Festschrift fuer Emmanuel von Severus OSB zum 80. Geburtstag, 189-210. Muenster: Aschendorff, 1988.
- Hughes, Andrew. Late Medieval Liturgical Offices: Resources for Electronic Research. Subsidia Mediaevalia, 23. Toronto: Pontifical Institute of Medieval Studies, 1994.
- Huglo, Michel. Les tonaires. Inventaire, analyse, comparison. Paris: Huegel, 1971. (See p. 255).