Glossary :: O
Obligatory Prayer
“The daily obligatory prayers are three in number.... The believer is entirely free to chose any one of these three prayers, but is under the obligation of reciting one of them, and in accordance with any specific directions with which it may be accompanyied.” (from a letter written on behalf of Shoghi Effendi)
Obligatory Prayer is preceded by ablutions
For the Text of these Prayers, see pages 92-101 of The Kitáb-i-Aqdas, and pages 314-23 of Prayers and Meditations (Bahá’u’lláh)
“one-eyed man”
See   Siyyid Muḥammad-i-Iṣfahání
Ocean of Light
See   Shrine of Bahá’u’lláh
Order of Bahá’u’lláh
See   World Order of Bahá’u’lláh
Oriental Pilgrim House
See   Pilgrim House
Ottoman Sultanate and Empire
ad 1299–1918
Dynastic regime, founded by Othman, which conquered the Byzantine Empire and ruled the Middle East from its Constantinople/Istanbul capital.
A-Z : Ottoman ~ Empire