Photo: Andries Oudshoorn, CC BY-SA 2.0 via Wikimedia Commons
Built as a prison in the rocky mountains in the 1580s during the Portuguese occupation, now converted into a museum devoted to Omani heritage. Unfortunately the fort is only opened to visiting dignitaries and heads of state and not open to the general public, but it's still possible to climb the steep stairs up to the top and to enjoy the view.
Al Jalali Fort, or Ash Sharqiya Fort, is a fort in the harbor of Old Muscat, Oman. The fort was built by the Portuguese under Philip I of Portugal in the 1580s on an earlier Omani fortress to protect the harbor after Muscat had twice been sacked by Ottoman forces. The fort fell to Omani forces in 1650. During the civil wars between 1718 and 1747, the fort was twice captured by Persians who had been invited to assist one of the rival Imams. The fort was extensively rebuilt later.
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This is the office of Sultan Qaboos, ruler of Oman. This beautiful palace stands on the head of a natural deep water harbour and is guarded on either side by the twin forts of Mirani and Jelali. Visitors are not allowed to visit the palace, but they are allowed to take photographs at the entrance of the palace.
Built at the same time as Al Jalali Fort which it faces across the harbour. This fort has also been converted to a museum which is closed to the general public, but it can be freely appreciated from the outside.
This small museum has displays detailing the relations between France and Oman, with many colonial objects from the 19th century.
This large museum tries to illustrate the history and customs of Oman from the Stone Age to the present day. Obviously huge effort is being put in the presentation, there are many 3D printed detailed models of Omani architecture and beautifully presented artifacts. There's also a curious exhibition of (largely kitsch) presents from foreign dignitaries on the top floor.
A gallery representing primarily Omani artists, and a few Oman-based western artists.
The museum features displays on Omani social history, while tours are frequently run of the neighbouring reconstructed townhouse.