There are a number of saints named Teresa so you will need to be more specific.
Mother Teresa has been beatified but not yet declared a saint.
There are several saints named Teresa so I am not sure which one you are referring to. However, when you see the word 'Saint' before the name of a person you can be sure they have been declared to be a saint.
As of January 27, 2015, Mother Teresa of Calcutta is not yet a saint. She has been declared Blessed which is one step before canonization.
Mother Teresa has not yet been declared a saint. She has been beatified, however.
I can find no saint named Teresa Vickers.
St. Teresa Redi is a saint but not a patron saint.
St. Teresa of Avila was made a saint in 1622, and a Doctor in 1970.
Saint Teresa was one of a number of saints by that name. Please narrow your question to a specific saint.
College of Saint Teresa ended in 1989.
Ecstasy of Saint Teresa was created in 1652.
The answer depends upon which Saint Teresa you are referring to as there are several.
Saint Anne was declared a saint in 1584. She is the grandmother of Jesus Christ as her daughter was Mary.