The chorales, fifteen in number, as has already been said, were taken from the Lutheran service.
The Chorales of the Hussites are especially deserving of investigation.
Only three chorales are known with certainty to be of Luther's composition.
The prelude was played at the beginning of the service, and before the chorales.
Chorales were sung by the congregation during the course of the service.
The movements are interspersed with chorales harmonised in four parts.
Bach used his chorales as models during the Arnstadt period.
All the other chorales in this work, six in number, are thus arranged and accompanied.
His chorales and passion music also belong in a class by themselves.
But Nicolai was also the composer of the “Queen of Chorales.”