Entrance to the Garden of Ridvan where Baha'u'llah declared
His Mission in 1863 and after twelve days departed for Constantinople. ... The
beauty of this garden is apparent through its service to humanity -- that is,
it was a hospital then and two successive governments have used it similarly ... [as] a center where bodily ailments are
healed.
(The Baha'i World 1926-1928)