Omar Ali Saifuddien Mosque

Omar Ali Saifuddien Mosque (Masjid Omar Ali Saifuddien, Jawi: ) is a mosque in Bandar Seri Begawan, the capital of Brunei. It is one of the country's two masjid negara or national mosques (the other Jame' Asr Hassanil Bolkiah Mosque), as well as a national landmark. It is one of the largest and oldest mosques in the country and is named after Omar Ali Saifuddien III (1914–1986), the 28th Sultan of Brunei and the father of the current monarch Sultan Hassanal Bolkiah. The mosque serves as a symbol of the Islamic faith in Brunei.

Construction
The mosque took almost five years to build and cost more than £1 million at that time.

The architectural firm involved in the construction was the Malaysia-based Booty Edwards & Partners, whereas the consulting firm was the Singapore-based Steen, Sehested and Partners.

The construction work began on 4 February 1954. The construction uses 1,500 tons of concrete and 700 tons of steel. The lengths of the foundation piles are between 80 - 120 ft.

The mosque was inaugurated on 26 September 1958 in conjunction with the 42nd birthday celebration of Sultan Omar Ali Saifuddien III. Tan Sri Hassan Azhari sang the call to prayer at the mosque's opening.

Architecture
Its architecture combines elements of Indian Mughal Empire's architecture and Italian Renaissance style, is the most photographed icon in the country. It was accounted that the design was first conceptualised by Sultan Omar Ali Saifuddien III and then developed by the commissioned architect Rudolfo Nolli, an Italian sculptor and decorative stonework contractor.

The size of the mosque is about 225 by and can accommodate 3,000 worshippers. It has a maximum height of 52 m. The dome is covered with gold. The floors and columns were built of marble from Italy at a cost of S$200,000. The interior houses a chandelier of 15 ft in diameter and weighing more than three tonnes; it holds 62 fluorescent tubes. The interior is also lighted by an addition of more than 480 tubes. The floors were covered with Axminster carpets, handmade from Belgium and Saudi Arabia.

The mosque sits on a 5 acre site and almost surrounded by a man-made lagoon. In the middle of the lagoon sits an artificial barge called Mahligai in which the design is meant to resemble a ship of Sultan Bolkiah, a Sultan of Brunei who reigned in the 16th century. It was inaugurated on 19 December 1967 in conjunction with the 1,400th anniversary of Nuzul Al-Quran, a holiday in the Islamic calendar which commemorates the revelation of the first verses of the Qur'an. Built at a cost of B$500,000 at that time, the barge was intended to be a permanent venue for various national Islamic religious events.