Simplify the following text for a Grade 5 native English-speaking person.
Original: Charles IV , known as the Fair ( 18\/19 June 1294 â `` 1 February 1328 ) , was the King of France and of Navarre ( as Charles I ) and Count of Champagne from 1322 to his death : he was the last French king of the senior Capetian lineage .
Simplified: Charles IV ( 18\/19 June 1294 â `` 1 February 1328 ) , was the King of France and Navarre ( as Charles I ) and Count of Champagne from 1322 to his death . Charles IV the last French king of the old Capetian line .