There is an explanation that Kamo-wakeikazuchi-jinja Shrine originated here. (A ship crossing the river from Kamigamo-jinja Shrine to the right bank was once called Omiya Ferry.)
賀茂別雷神社の旧地との説もある（上賀茂神社から賀茂川右岸側への渡しはかつて「大宮渡し」と呼ばれた）。