From Wikipedia
Ceilings have frequently been decorated with fresco painting, mosaic tiles and other surface treatments. While hard to execute (at least in place) a decorated ceiling has the advantage that it is largely protected from damage by fingers and dust. In the past, however, this was more than compensated for by the damage from smoke from candles or a fireplace. Many historic buildings have celebrated ceilings. Perhaps the most famous is the Sistine Chapel ceiling by Michelangelo.
Ceiling height may have psychological impacts
Źródło: https://en.wikipedia.org/wiki/Ceiling#Elements
plaster - the demand for specialists
Nowadays still we have a very big problem in the labor market, as you can see, if you look at the number of people who have a hard time finding a well-paid, yet rewarding job. Undoubtedly, however, can be distinguished so many different professions that everyone should finally find something for themselves. A good example is the stucco, and so unusual interior decoration in all kinds of buildings. Used to this special material, usually resembling plaster. The person dealing with this issue must have extensive knowledge in the area of construction and carving art. It is estimated that still a lot of people will want, apply stucco in your home.
original way to make money
A fairly simple task would be to list dozens of professions, because the modern world is so developed that in recent years, a lot of ways to make money, and those created many years ago are still not time-barred. A good example of the latter case is the stucco, plaster ornaments and so on the external walls and internal. A person specializing in this field should have a broad knowledge in the field of construction machinery, as well as sculptural art, because the stucco was based on these two areas. To create a solid stucco are necessary exceptional manual dexterity and patience, so surely this is not a job for every man.