It seems that those letters were primarily written to the Jerusalem ecclesia, most of whom would have been baptized in the early days recorded at the beginning of Acts.
Inaonekana kwamba nyaraka hizo kimsingi ziliandikwa kwa ajili ya Iklezia lililokuwepo Yerusalemu, wengi wao walikuwa wamebatizwa siku za kwanza zilizoandikwa mwanzoni mwa Matendo ya Mitume.