Sultan Sulaiman Mosque, Royal mosque in Klang, Malaysia

Sultan Sulaiman Mosque is a place of worship in Klang that features an octagonal main prayer hall with walls that curve into a circular shape as they rise to meet a yellow dome. The structure blends Western architectural styles with Islamic design elements, creating a distinctive religious space.

The British government gave the mosque to Sultan Alaeddin Sulaiman Shah to mark Klang's declaration as a royal town, replacing the unsafe Pengkalan Batu Mosque demolished for the railway station. The Sultan laid the foundation stone in 1922, and the mosque opened on 23 June 1923, then reportedly the largest in the Federated Malay States. It served as Selangor's state mosque until 1988 and was declared a National Heritage Building in 2012.

The mosque houses a royal mausoleum where members of the Selangor ruling family are buried. Visitors can see these final resting places and understand the deep link between this religious site and the local dynasty.

The mosque is accessible by public buses from Seranas Group and Smart Selangor services. Visitors should dress modestly and be aware of prayer times, as these may affect visiting hours.

The decorative iron frames supporting the multi-coloured patterned glass sit under the main dome, not on the towers. The mosque's original floor was white marble with 400 mm marble skirting, now covered by newer tiles. The wooden pulpit of cengal hardwood with its original brass railing still stands.