Where was christianity most widespread in 325ce

somewhere in coastal locations

Harlem

Explanation:

Although the Harlem Renaissance was not restricted to the Harlem neighborhood of New York City, that area was the symbolic capital of that cultural awakening that lasted approximately from the 1910s through the mid-1930s and had expressions in literature, music, theatre, and art. Jazz music became very popiular for both Harlem residents and outside white audiences coming from as far as Europe.