Some Remarks on the Design of two Residential Complexes in Poland from the End of the 10^th Century. St. Augustine, Boethius and the Concept of Palatium.

Ostrów Lednicki and Giecz are two of the most important centers of the Polish state in the 2-nd half of the 10^th century. In both sites the remains of residential complexes have been discovered. Both consist of a central planned chapel abutted to a rectangular building on the same axis. In both cases the chapel is situated on the east side of the building, divided into small rooms. On the opposite, west side of the whole complex there is a square room, possibly an aula. Taking the idea of composition into consideration we can say that the aula counterbalanced the central chapel. In this whole symmetrical layout we can follow a modular rhythm, which unites both sacral and representational parts of the complex. But the most important question is to determine where the idea of these proportions came from. It is possible that this layout was designed by the same author, who was inspired by the books of Boetius De Arithmetica and De Musica, or by Musica Enchiriadis. Not only is a mathematical theory of music described in these books, but they also contain illustrations of music proportions. It is possible that the architect who worked for Mieszko I or Bolesław the Brave knew one of the copies of the work of Boetius or Anonymus of. St. Amand.