Under such conditions the concealed door naturally suggests itself. To those who regard its use as an offense against artistic integrity, it must once more be pointed out that architecture addresses itself not to the moral sense, but to the eye. The existing confusion on this point is partly due to the strange analogy drawn by modern critics between artistic sincerity and moral law. Analogies are the most dangerous form of reasoning: they connect resemblances, but disguise facts; and in this instance nothing can be more fallacious than to measure the architect's action by an ethical standard.
CARVED DOOR, PALACE OF VERSAILLES.
LOUIS XV PERIOD.
(SHOWING PAINTED OVER-DOOR.)
PLATE XVIII.
"Sincerity," in many minds, is chiefly associated with speaking the truth; but architectural sincerity is simply obedience to certain visual requirements, one of which demands that what are at once seen to be the main lines of a room or house shall be acknowledged as such in the application of ornament. The same architectural principles demand that the main lines of a room shall not be unnecessarily interrupted; and in certain cases it would be bad taste to disturb the equilibrium of wall-spaces and decoration by introducing a visible door leading to some unimportant closet or passageway, of which the existence need not be known to any but the inmates of the house. It is in such cases that the concealed door is a useful expedient. It can hardly be necessary to point out that it would be a great mistake to place a concealed door in a main opening. These openings should always be recognized as one of the chief features of the room, and so treated by the decorator; but this point has already been so strongly insisted upon that it is reverted to here only in order to show how different are the requirements which justify concealment.
The concealed door has until recently been used so little by American architects that its construction is not well understood, and it is often hung on ordinary visible hinges, instead of being swung on a pivot. There is no reason why, with proper care, a door of this kind should not be so nicely adjusted to the wall-panelling as to be practically invisible; and to fulfil this condition is the first necessity of its construction (see concealed door in [Plate XLV]).