[Math] Which great mathematicians were also historians of mathematics

Question

As the question title suggests, which great mathematicians were also historians of mathematics?

We all know plenty of great mathematicians, but not many historians of mathematics. Not to mention that the history of mathematics can be dismissed as mere sociology sometimes and isn't very popular.

Answer 1

Jean Dieudonné was not only an important member of Bourbaki, but also wrote several works on the history of mathematics.