Simplify the following text for a Grade 13 native English-speaking person.
Original: With the invention of printing , in 1440 , and particularly the development of the lithographic process , invented by a Czech named Alois Senefelder in 1798 in Austria , creation of poster become feasible .
Simplified: With the development of the lithographic process , invented by a Czech named Alois Senefelder in 1798 in Austria , creation of poster become feasible .