I came across this proposal for a Baha'i temple in Papua New Guinea from the firm of Maziar Behrooz Architecture.
'In keeping with the Bahá’í Faith’s devotional practices and its emphasis on universality, the auditorium of the House of Worship and the activities within it are kept simple. Images and pictures are excluded from the auditorium. No altars, pulpits, or fixed speaker’s platforms are erected. No talks or sermons are delivered, and no elaborate ceremonies practiced. Since the Bahá’í Faith has no clergy, no one person leads devotions in the auditorium of the House of Worship. During devotional programs, invited readers, who may be adherents of any religion, recite or chant the holy scriptures of the Bahá’í Faith and of all other religions. Music, which is regarded as an important part of the worship and praise of God, may be included in the devotional services in the auditorium of the House of Worship. Only music based on words of holy scripture and sung a capella by a choir or soloists is used in the auditorium; recorded and instrumental music are not permitted there'. Ref.