Suleiman the Magnificent issued approximately 150,000 letters of state during his reign.

Evidence

The tughra would be at the top of all important official documents, and Suleiman issued about 150,000 in his reign. — Neil MacGregor, A History of the World in 100 Objects, 1104

Categorization

• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 1104