useless trivia: What Word Means: A Member Of A Hindu Caste Devoted To Dairy Work?

Questions

In 1986 Pope John Paul II met Rome's Chief Rabbi ---------- at Rome synagogue.?

In 1986 Pope John Paul II met Rome's Chief Rabbi Elio Toaff at ---------- synagogue.?

In 1817 First American school for the ---------- (Hartford, Connecticut)?

In 1865 President Abraham ---------- shot in Ford's Theatre by J.W. Booth.?

In 1889 Arnold ---------- , historian, born.?