About an hour
One hour.
About an hour depending on whether you read everything with the exhibits.
That depends on you really. You can take as much time as you need. It's not a massive place but it is big.
About 1 hour
If you wanna do the full thing -- art museum and all -- I'd say about 1.5-2 hours. If you only care to see the building and Athena statue, probably like 30-45 minutes
Less then that but if your interested in reading everything almost 1:30.
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