The side part has a clamp-type joint element (15) which is joined to the front strip (9).

At least one preferably strip-shaped wall facing (3, 12) adjoins the flat element (1) in the same plane.

Outside, the cornice conserves a continuous frieze of blind arcades on consoles, an architectural motive of an older Romanic tradition.

The sealing strip (54) has a channel-like outline (35) engaging with the sealing shoulder (7) and the latter has tongues (32) separated by a gap (33).

Outside, the cornice conserves a continuous frieze of blind arcades on consoles, an architectural motive of an older Romanic tradition.

The outer shell comprises a metal front strip (14) on which a groove (5, 6) delimited by a guide chamfer and receiving an edge of the inner container is formed.

The blade (6) is secured to a doctor blade supporting bar (5) and may be pressed against the paper width by means of a frame batten (7) which is also secured to the doctor blade supporting bar (5).

The front strip (9), which is inserted into the joint element (15), exerts a force upon the edge strip (6), working towards an expansion of the angle at which the edge strip (6) is connected to the side wall (7) thereof.

The under side of the groove (6) consists of a ledge (10) fixed to the under side (8) of the panel and protruding in respect of the upper side (9) of the panel.

In connection with the invention it is also recognized that the ceiling list, when made hollow, is advantageously usable for a concealed trunking of conductors for highly placed sensors e.g. fire detectors or remote control units.

Thus, the latter list element will be easy to both remove and remount, and it will then be unimportant whether the painting or wallpaper hanging is not terminated particularly accurately along the ceiling corner.

The ledge (10) and the groove (12) are furnished with complementary locking means for locking the edge (11) in the groove (12), whereby the panels are fixed to each other and prevented from unintentional separation.