The French Academie Royale d'Architecture discussed on the ideal size of interior cornices in 1710. The analysis from the Minutes and the Reports reveals that the ideal view distance was from 8 to 18 pied (feet) and that these scales correspond exactly to the interior scales of the Parisian hotel residences in the 17^<th> and 18^<th> century. And contrary to Vitruvius who took the ratio of two optic angles, the Academie made use of the optic angle of cornice.
