Types - from Wikipedia
Astragal ? A semi-circular molding attached to one of a pair of especially fire doors to cover the air gap where the doors meet.
Baguette ? Thin, half-round molding, smaller than an astragal, sometimes carved, and enriched with foliages, pearls, ribbands, laurels, etc. When enriched with ornaments, it was also called chapelet.2
Bandelet ? Any little band or flat molding, which crowns a Doric architrave. It is also called a tenia (from Greek ?????? an article of clothing in the form of a ribbon.2
Baseboard, "base molding" or "skirting board" ? used to conceal the junction of an interior wall and floor, to protect the wall from impacts and to add decorative features. A "speed base" makes use of a base "cap molding" set on top of a plain 1" thick board, however there are hundreds of baseboard profiles.
Baton ? see Torus
Batten or board and batten ? a symmetrical molding that is placed across a joint where two parallel panels or boards meet
Bead molding ? narrow, half-round convex molding, when repeated forms reeding
Beading or bead ? molding in the form of a row of half spherical beads, larger than pearling
Other forms: Bead and leaf, bead and reel, bead and spindle
Beak ? Small fillet molding left on the edge of a larmier, which forms a canal, and makes a kind of pendant.2 See also: chin-beak
Bed molding ? a narrow molding used at the junction of a wall and ceiling. Bed moldings can be either sprung or plain.
Źródło: https://en.wikipedia.org/wiki/Molding_(decorative)#Types
Traditional methods of decorating walls and ceilings
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The most interesting ideas for finishing the "four corners"
There's no denying that nowadays increasingly counts originality in every aspect. We make every effort to ensure that, to dress in a manner unprecedented in outlining his own style. It is no different in the case of arranging the spaces in which we live. Human nature is such, and not another, that we want to surprise our guests. Plaster is quite original and even extravagant technique for finishing the exterior walls and the interior, which has its roots in ancient times. It is characteristic of the buildings from that period, so the use of this method in your case warrants the originality of living space. Without much of a problem in every city we should find even one of ordinary skill in this field.