What is contribution of magdalena cantoria?

It seems you're asking about the contributions of Magdalena Cantor, not Cantoria. However, there's no readily available information about a notable figure with that name.

It's possible there's a misunderstanding:

* Incorrect spelling: Perhaps you're looking for someone with a similar name, but spelled differently. Please double-check the spelling.

* Specific field: Is Magdalena Cantor associated with a particular field like art, science, music, or politics? Providing more context might help in finding information.

Please provide more details, and I'll do my best to assist you.