See Medici (def. 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use Cosimo I in a sentence
It derives its name from the guard of foreign soldiers that Cosimo I. established in quarters hard by.Cathedral Cities of Italy | William Wiehe Collins
Their first company lasted till the time of Cosimo I., who patronized it, and superintended its reorganization in 1562.The Cathedral Builders | Leader Scott
In 1553 the monastery was suppressed by Duke Cosimo I., and turned into a fortress.The Story of Florence | Edmund G. Gardner
By the peace of 1559, however, it passed to Cosimo I. of Tuscany.
The town was built and fortified by Cosimo I. in 1548, who called it Cosmopolis.