The Sultan Salahuddin Abdul Aziz Shah Mosque (, ) is the state mosque of Selangor, Malaysia. It is located in Shah Alam. It is the country's largest mosque and also the second largest mosque in Southeast Asia by capacity. Its most distinguishing feature is its large blue and silver dome. The mosque has four minarets, one erected at each of the corners. History The mosque was commissioned by the late Sultan Salahuddin Abdul Aziz, when he declared Shah Alam as the new capital of Selangor on 14 February 1974. Construction began in 1982 and finished on 11 March 1988. The mosque is also known as the Blue Mosque owing to its blue dome. Records The mosque has the distinction of having one of the largest religious dome in the world, measuring in diameter and reaching above ground level. The four minarets, each reaching above ground level, are the third tallest in the world, after those at the Hassan II Mosque in Casablanca, Morocco, and the Djamaa el Djazaïr in Algiers, Algeria. In its early years, the mosque was listed in the Guinness Book of Records as having the tallest minaret in the world before being supplanted by the minaret at the Hassan II Mosque in August 1993. However, the mosque still maintains the distinction of having the world's tallest group of minarets. Architecture and features The design of the Sultan Salahuddin Abdul Aziz Shah Mosque is a combination of Malay and Modernist styles, and elements of Malay and Islamic architecture are incorporated into the finishes of the building. Fine decorative khat (Arabic calligraphy) can be seen on the inner curve of the dome and parts of the walls. The calligraphy work was executed by the Egyptian calligrapher Shiekh Abdel Moneim Mohamed Ali El Sharkawi. Intricate aluminium grills are found on the doorways, windows, and walls of the mosque. The windows are fitted with blue stained glass to reduce the amount of light entering the hall. The resulting filtered illumination lends a bluish ambiance to the interior spaces, evoking a sense of peace and serenity. The high ceiling has triangular panels of red balau and ramin timber wood that are set in a crisscrossing pattern. The dome is constructed of aluminium and the outer surface is clad with vitreous enamel-baked triangular steel panels decorated with a rosette of verses from the Qur'an. The main prayer hall spans two levels, is fully