Built in the traditional Qatari design from coral rock and limestone between 1910- 16, this imposing 16-meter high watchtower was a lookout for approaching ships, particularly those of incoming Ottoman troops in the early 1900s. It is believed to have also been used to protect water supplies and as an observatory to track the moon and determine the dates of the lunar calendar. Unlike other forts in Qatar, the Barzan Towers were built over several floors, giving it the name Barzan, which means High Place in Arabic.

https://qm.org.qa/en/visit/heritage-sites/barzan-towers/