Here are just a few of the Georgetown Library catalog subject headings you may want to search.
Middle Ages -- Sources
Canon law -- History
Europe--History--476-1492
Catholic Church -- Spain -- History
Inquisition -- Spain
Spain -- Religious life and customs
Europe--History--15th Century
Thirty Years' War, 1618-1648 -- Sources
Europe--History--16th Century
Europe--History--17th Century
Europe--History--18th Century
Europe -- Social policy
Emigration and immigration
Intellectual life
Social conditions
Intellectual life--18th Century
Women -- Europe -- History -- Middle Ages, 500-1500.
Sex role -- Europe -- History.
Social history -- Medieval, 500-1500.
Women in Christianity -- History -- 16th century
Reformation
Christian women -- Religious life
Go to the library website or the library catalog
Start with what you know: the Black Death
Review the list of results, a few things will jump out as you go through the results
Once you've found an interesting title, click on it to view more details - for example: search for Black Death
This view is the called the brief view for the title, but if you click on the title link you can see the detailed view of the item. This has several important features that can help you advance your research.
The Black Death Transformed by 
Moorish Culture in Spain by 
European Transformations by