Kormchaia Book
The Kormchaia Book, also known as the Books of the Pilot (Russian: Ко́рмчая книга, Ко́рмчая, from кормчий, Church Slavonic: кормчїй 'helmsman, ship's pilot'; Pidalion (Russian: Пида́лион from Ancient Greek: Πηδάλιον, Πηδαλίων 'stern oar, helm, handle of helm, rudder') or Nomocanon (Russian: Номокано́н from Ancient Greek: Νομοκανών from νόμος 'law, statute' + κᾰνών 'canon, rule'), are collections of church and secular law (see also Byzantine law), which constituted guide books for the management of the church and for the church court of Orthodox Slavic countries and were also the transmission of several older texts. They were written in Old Church Slavonic and Old East Slavic.