As stated in other reviews best to go on a Sunday when it is free entrance. The collection itself is all in one or two big rooms, the only smaller room being for the jewellery at the end. The artefacts themselves range from old Greek coins, to a few things from an Egyptian tomb or two, a few large Persian rugs, Chinese vases, etc. There are a few examples of each but nothing on the scale of e.g. the British Museum in London. The link between the displays is rather tenuous. I expect this proves that the Portuguese plundering from other cultures was quite subdued compared to the other colonialists. The most interesting bits for me were the 18-19th century serving vessels made from silver and the jewellery at the end. There is English information which is better than museums in some other countries so at least you don't have to be a native to read some of the interesting facts .A plus was there is an art gallery near adjoining so you can do both. The restaurant downstairs is great though for salads and hot meals at a reasonable price. It was full around 2pm on a Sunday. All in all made a good Afternoon.
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