There are free garden and architecture tours lasting about 45 minutes. Also free tours of the museum collection. Visitor services can help you as you enter the Villa
They do have docents, and self guided programs.
Tours are available at no cost.
There are plenty of tours that you can sign up for if you want a guide. There is also an audio tour that you can do I believe.
I believe you can if you call ahead of time!
yes there are tour guides, for free!
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