Breviarium trajecense ad usum ecclesiae collegiatae Sancti Lebuini daventriae (Pars aestiva)
Description
Given the liturgy and the presence of the Office for the Saint,
this breviary originated in St. Lebuinus Church in Deventer
(Netherlands). It belonged to Swibert de Keyserswerth (died after
1551), paternal grandfather of the Dutch organist and composer Jan
Pieterszoon Sweelinck (1562-1621).