_Lierne-vault_ Any vault which contains liernes: _i.e._, tie-ribs on the surface, which do not spring from an abacus, nor rise to the central boss. _Miserere_ A carved bracket beneath the movable seat of a stall. _Moulding_ Any architectural member is said to be moulded when its edge or surface presents continuous lines of alternate projections and recesses. _Mullions_ Vertical bars in a window. _Nave_ The western limb of a church, (1) including or (2) excluding its aisles. _Ogee arch_ An arch, each side of which has a double curve; the upper part concave, the lower part convex. _Order_ A compound arch is one which is built up of two or more Orders, or sub-arches, usually recessed. _Parapet_ A low wall, not embattled, but with a horizontal upper surface, at the foot of a roof. _Piers_ The supports of arches; sometimes cylindrical, sometimes polygonal; sometimes clusters of columns; sometimes masses of masonry ornamented with shafts. _Pilaster_ A flattened column. _Pinnacles_ Small spires employed to weight buttresses, etc. _Plinth_ The pedestal of the base of a pier or shaft or wall. _Piscina_ A water-drain, appertaining to the high altar. (1) A niche. (2) A shaft. (3) An opening in the pavement. _Presbytery_ (1) The sanctuary only. (2) The whole of the space between the ritual choir and the east end: _e.g._, York and Lincoln and Ely—_i.e._, sanctuary plus retro-choir. _Quadripartite One in which each compartment is divided into four vault_ cells by diagonal ribs. _Quatrefoil_ An ornament with four lobes. _Refectory_ The dining-hall or frater of a monastery. _Reredos_ The screen at the back of a high altar: _e.g._, Winchester. _Ribs_ The arcs which intersect to support the filling-in of a vault. _Romanesque_ The style of Northern architecture intermediate between that of the Early Christian Basilican churches and that of the Gothic cathedrals. Anglo-Norman or Norman is one of its geographical subdivisions. _Roll_ A rounded projecting moulding. _Rood_ The crucifix.