The answer to this question is entasis.
Entasis is a design principle in architecture where in a convex curve was applied to a surface which also serves a strength to the construction and it also gives an optical illusion to it. Egyptian pyramids use this design principle.
Music from the Romantic period or era (1850-1900) is characterized
by personal, emotional and expressive style and composition. The melodies and
lyrics of music from this period evoke more emotion than other styles of music.
Compositions from the Romantic era of music revolved around themes of: nature,
the supernatural, magic, dreams experiences of love or negative feelings and so on.
