Byzantine art is almost entirely concerned with religious expression and, more specifically, with the impersonal translation of carefully controlled church theology into artistic terms. Its forms of architecture and painting grew out of these concerns and remained uniform and anonymous, perfected within a rigid tradition rather than varied according to personal whim; the result was a sophistication of style and a spirituality of expression rarely paralleled in Western art.
In New Orleans, black performers such Louis ARMSTRONG completed the transition from ragtime to jazz, creating a style known as "Dixieland" Jazz or "Hot" Jazz, as improvised over standard blues patterns.