Art I’d combine with your content twice as museum option for visitors? (5,4)

'art i'd combine with your content twice as museum option' is the definition.
I know nothing about this answer so I can't judge whether this works.

'for visitors?' is the wordplay.
I cannot really understand how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?