 Another marble bridge leads to a structure in the lagoon meant as a replica of a 16th-century Sultan Bolkiah Mahligai Barge.The barge itself was completed in 1967 to commemorate the 1,400th anniversary of Nuzul Al-Quran (coming down of the Quran) and was used to stage the Quran reading competitions.The mosque's most recognizable feature, the main dome, is covered in pure gold.