Please correct me if I'm wrong

[summer rain]

Is the following question grammatically correct?:roll:
"Whose idea was is to build this hospital?"

 

[apex2000]

Is the following question grammatically correct?:roll:
"Whose idea was (is) it to build this hospital?"

As altered, now OK.

 

[summer rain]

Thanks a lot :-D and as for the question, I was asking about a building that was established in the past.

 

[Anglika]

It is still correct.