| Zutphen: Walburgiskerk |
The Walburgiskerk in Zutphen has been founded as a chapter church in the 11th century. Most of its manuscripts are preserved in the Stadsarchief and in the Librije, which is connected to the church.
Several manuscripts have been preserved, dating from the 15th or early 16th centuries. The largest is a summer Antiphoner NL-ZUa 6. Smaller manuscripts, containing only a limited number of offices and a few mass chants (a.o. a few sequences) are NL-ZUa 2 & NL-ZUl 6, two identical manuscripts, meant for both sides of the choir (Hertogdom Gelre, deel 2, nr. IV-22, incl. facs). There is also a Necrologium (often called Mortuarium) NL-ZUa 12 (Hertogdom Gelre, deel 2, nr. IV-27, incl. facs).
Other manuscripts are:
 | B-Bb 680 is a Breviarium festivum, ca 1470 |
| | NL-ZUm Liber Aureus: this contains some lectiones and the Liber Generationis (Hertogdom Gelre, deel 2, nr. IV-26, incl. facs) |
| | NL-ZUl 5 contains the responsoria brevia for the divine office (Hertogdom Gelre, 2, nr. IV-24, incl. facs) |
| | NL-ZUa 7: Missale (without notation) of the Anthonius-altaar of the Walburgiskerk |
Some light can be shed on the Zutphen tradition by ms NL-ZUa 1, a choir book from the parish church of Warnsveld, in the neighbourhood of Zutphen, containing a small number of offices.
In addition, there is a charter from 1540, with rules of conduct for the liturgy: NL-ZUa 561 (?). Its text is also preserved in a 17th-century transcription: Collectie Kreynck, nr. 61, fol. 62v.
Lochem, parish church, dedicated to Gudula (parish church).
 | De Sint-Walburgiskerk in Zutphen, espec. the contributions of De Loos and Geurts |
| | J. Hartman: De altaren in de St.-Walburgiskerk in de 16e eeuw, in: Zutphen. Tijdschrift voor de historie van Zutphen en omgeving, jaargang 18, 1999-1, pp. 7-20 |