The purpose of this article is to supplement the existing research into the musical tradition of the St Elizabeth church in Wroclaw with information from previously unexplored archives. Sources held at the Voivodeship State Archive in Wroclaw allow us to examine more closely the structure and the dynamics of the development of musical institutions in that area. Particular attention is devoted to the ensemble of Elizabethan choristers; it was one of the more influential musical communities of the city, an institution which played a very significant part in the development of future administrative, didactic and church staff. The surviving financial documentation of that ensemble allows us to reconstruct the ensemble's personnel in detail. A comparison of the expenditure on musical settings throughout the centre, preserved in the church accounts, allows us to establish the social status of the ensemble's musicians. In these sources we find references to persons already known to us from previous research as participants in the musical life of seventeenth-century Wroclaw; however, we also find previously unknown musicians, which makes it possible to verify and expand the state of current research. In particular, the archives from the period 1649-1654 suggest a need for a thorough review of the picture of the musical culture of the Wroclaw church of St Elizabeth, since they document a fundamental reorganisation of the whole ensemble. This may relate to the introduction of the latest style of Italian compositions - the 'seconda pratica' style - into the repertoire being developed in that centre.