studied at the university vs studied in the university

Some examples from the web:

• I studied at the University of Santiago.
• In my youth, I studied at the University of Milan for more than 2 years.
• He studied at the University in Warsaw, escaped through France.
• I studied at the University of Paris until the English invaded.
• I spent three years in your country, studied at the University of Michigan.

Some examples from the web:

• Indeed, in my own country, Scotland, that lasted until the 17th century, during which 6000 members of the Faculty of Advocates of Scotland at various times studied in the universities of Utrecht and Leiden.
• Of course, we studied in the same university.
• He studied at the University in Warsaw, escaped through France.
• I studied at the University of Paris until the English invaded.
• At the university you studied about Mesmer... and hypnotic suggestion.
• Yes, I studied psychology at the University of Edinburgh under Professor O'Donnell...
• I studied Chinese at the University of Venice.
• 1968 - 1973 Studied economics at the universities of Hohenheim and Tübingen
• I spent three years in your country, studied at the University of Michigan.
• I studied at the University of Santiago.
• Not bad, Miss Higginson, but you should know that I extensively studied fencing at the university.
• As you can see from my CV, I studied economics at the universities of Leuven and Cambridge, with public finance and monetary economics and my specialist subject.
• In my youth, I studied at the University of Milan for more than 2 years.
• His name is studied science at Tokyo University.
• When I studied at Hebrew University, I wanted to live around here.
• They tell me you studied at Oxford University.
• I studied Economics at the Universities of Gießen and Bonn from 1988 to 1994 and specialised in Monetary and Exchange Rate Policy at the Institute for Inter-national Economic Policy in Bonn.
• Who studied some physics in university?
• Born in 1985, she studied economics at Cairo University and later worked for a computer company.
• At University he studied law, politics and history before becoming a research assistant.