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Photo: RobertGalea, CC BY-SA 4.0 via Wikimedia Commons
At night in St George's Square, there is a lovely water fountain, with coloured spouts of water which pop up and down - a fantastic play opportunity for children. They will get wet, so don't let them go near if they are wearing their best clothing. Great fun for kids.
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Now it is the President's office and the Maltese parliament. The staterooms, when accessible, are quite impressive. It also houses the Knights' armoury, which is open to visitors daily from 09:00-17:00. (However, all other parts of the palace are closed to visitors, so what you can see is limited.) At the entrance, you can receive an audio guide, which is included in the entrance fee. It provides you with further historical information about the various armoury of different eras, beginning from the medieval chain mail up to the 17th-century armour.
Bibliotheca
An evocative old library on Republic Square, next to the Grandmaster's Palace. Only part of it is open to the public: you will need to take a passport or other photo ID to get in. The entire archives of the Knights of St. John from the Crusades in the 11th century until 1798, when Napoleon took Malta, are kept here, in true Maltese style in rickety wooden filing cabinets.
Maltese: It-Teatru Manoel
'La Scala' in miniature, a very beautiful 17th-century theatre in its original state. One of the oldest active theaters in Europe, it is the place for many classical music performances but also for instance the hilarious Christmas Panto.
Museum run by Maltapost, including a working post office.
Unremarkable from the outside, but incredibly ornate on the inside. Each of the different 'langues' (knights of a particular nationality had their own langue) has its own chapel lined along the side of the nave in which they tried to outdo each other in splendour. The barrel-shaped ceiling is a single, huge fresco, the lifework of famed artist Mattia Preti. The floor is entirely taken by the knight's graves intricately inlaid in marble in different colours. One book on the subject describes it as the 'most beautiful floor in the world.' This lesser-known cathedral is one of the most impressive in Europe. Entrance is through the Carappechia Annex on Republic Street, between St. John's Street and St. Lucy Street, directly opposite the Law Courts. An audioguide is included in the entrance fee, which provides detailed historical information.
A Maltese noble family house on Triq ir-Republika, a few hundred metres past the Grand Master's Palace on the right-hand side. Very enjoyable.