You have to be careful with the use of the term FACULTY. In the US this word serves PRIMARILY to describe the entire teaching and administrative force of a university. It is also used to describe the members of a learned profesion.

For instance, at the University I attended I got a diploma from the Business SCHOOL, and the graduation ceremony was attended by the whole FACULTY (All the professors within the department) .

Because of this, the term SCHOOL should be used in this context, where it is referring to the actual organizations themselves.

Here are some website examples:

University of Utah-School of Medicine-
School of Music | University of Utah
and so forth . . .

Do any Google search for any US University and include the word school and it will point you to the Organization.

Indeed faculty really is FACULTAD, but it's not the same thing.

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Note added at 1 hora (2006-11-02 12:08:22 GMT)
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Maybe this example will help to clear things up. This website is talking about a Professor and it says:

Professor X has held FACULTY and visiting FACULTY positions at the law SCHOOLS of the University of North Carolina, American University, and the University of ...

Does it make sense now? In the case of a diploma or any title, IN THE US, this is extended by the SCHOOL and obviously the FACULTY (the teachers) endorses the degree.