The Indianapolis Spiritual Assembly decided in March, 1967 to proclaim the Baha'i Faith through holding a "Baha'i Week" in November, 1967, marking the 150th anniversary of the Birth of Baha’u’llah and held just one year after the first proclamation week in Indiana (Fort Wayne, November, 1966). Work began immediately and preparations proceeded through the following months. A prelude to the Week was the annual State Fair Baha'i exhibit in August which publicized the coming event to at least 250,000 people. The launching of the Proclamation was in October when the Mayor of Indianapolis, John J. Barton, and a State Senator, Nelson Grills, were present at a tea commemorating the centenary of the messages of Baha’u’llah to the kings and rulers.
(US National Baha’i Review, February 1968)