Ita quod est quoquoversus quinque palmorum, pentadoron, quod quattuor, tetradoron dicitur, et quae sunt publica opera, pentadors, quae privata, tetradors struuntur.
Thus the brick that is of five palms every way is called pentadoron; of four palms, tetradoron. Public buildings are erected with the former; private buildings with the latter.
final_alignments\Vitruvius_Architecture_Book_2.json