No person may have straight views or windows of appearance, nor balconies or other similar projections on the enclosed or unenclosed inheritance of his neighbour, unless there is a distance of nineteen decimetres between the wall where they are made and the said inheritance, unless the land or the part of the land on which the view is exercised is already encumbered, for the benefit of the land which benefits from it, by an easement of passage preventing the erection of constructions.