The Oberösterreichische Landesbibliothek Linz preserves under the manuscript shelfmark 529 26 folios of a former choirbook with polyphonic music, which was written about 1500 and was probably related with the court chapel of Emperor Maximilian in Linz. The following preliminary inventory is taken from Reinhard Strohms article Polyphony in late medieval Austria (Musica Disciplina 38 (1984), 205-230). New detailed informations are available in the descriptions of Marc Lewon (research project Musical Life of the late Middle Ages in the Austrian Region 1340-1520).The page references contain links to the images and descriptions.
Publication of the images with permission of Dr. Rudolf Lindpointner, Oberösterreichische Landesbibliothek Linz.

Page / Link	Lewon	Work / Comment
5 / 6		(Obrecht): Missa Salve diva parens (Sanctus, Benedictus)
33 / 34 / 35		Obrecht): Missa Plurimorum carminum II (Credo, Sanctus, Agnus dei)
36		Kyrie trope Christe bone conditor atque redemptor …
22 / 23 / 49 / 50		Messe with unidentified c. f. (A-A-c-d-c-e-d-c-d-f-d ... ) only Bass voice (Kyrie, Gloria, Credo, Sanctus)
25 / 26 / 53 / 54		Mass, two lower voices. Head motives of the Credo resemble no. 16
13		Requiem (presumably Introitus)
12		Sequence Benedicta semper sit sancta Trinitas (also in Codex Leopold, Codex Apel, Berlin 40021, Wroclaw Mf 2016)
3		Magnificat octavi toni (in F)
37		Magnificat octavi toni? (in C)
14		Hymn Primum virtutes (Omnes superni)
18		Two canonical duets about the hymn Sumens illud (Ave maris stella)
45		(later layer:) Hymn Urbs beata (also in Wroclaw I F 428, fol. 128 v)
46		Hymn?
31		Offertorium Recordare with trope Ab hac familia
32 / 4		Offertory Recordare
41		Trope Ab hac familia (Continuation?)
7		Super creaturarum omnium habitacio est in te sancta dei genitrix (?). C. f. in the upper voice, similar to Argentum et aurum
44	44	Textless motet (?), also in Glogauer Ldb. no. 100
28	28	(Isaac): Motet Argentum et aurum (also in Codex Leopold, Codex Apel)
29	29	Dung plus amer
39	39	(Christ ist erstanden); c.f. in the upper voice
30	30	(Hayne): Si une fois
1	1	J'ay pris amours; c. f. by Obrecht, 2nd part, transposed up a quart
9	9a / 9b	a) Marchez la dureau (also in Dijon fol. 168 v, Tr89) b) J'ay pris amours (also in Tr Com. 1947-4)
17	17	De tous biens pleine (2 voices = Odh fol. 102 v)
15	15+20	J'ay pris amours (only Tenor = alternative version)
43	43	Le serviteur (2 voices = Odh fol. 37 v)
27	27	Le serviteur (also in I-Fn 229, no. 258)
2	2	Heya ho nun wie si grollen, text: Oswald von Wolkenstein (also in Tr 89, Fn 229)
10	10	(Antoine Busnoys): Ung grand povre home insanne
16 / 40 / 20	16 / 20 / 40	3 textless chansons (das Letzte: stuckl)
19	19	O fraw wie graw (?), textless chanson
21	21	Ein tagweiß (repeating conspicuously, 'modal' rhythm)
8 / 42 / 47 / 51 / 52		Textless lower voices of motets or chansons