The Tabernacle of Unity is a small book, first published in July 2006, containing Bahá'u'lláh's Tablet, from the early ‘Akká period, to Mánikchí Sáhib, a prominent Zoroastrian, and a companion Tablet addressed to Mírzá Abu'l-Fadl, the secretary to Mánikchí Sáhib at that time. These, together with three shorter inspirational Tablets, offer a glimpse of Bahá'u'lláh’s relationship with the followers of Zoroastrianism.