A Choralschola, known simply as schola, is a choir for singing Gregorian chant or plainsong. It consists traditionally of only men, but more recent groups sometimes also include female voices. A schola often performs in uniform. The group may perform in the liturgy of church services, but some specialized ensembles also perform concerts and recordings, such as the Choralschola der Wiener Hofburgkapelle and the Schola Gregoriana Pragensis.