Simplify the following text for a Grade 14 native English-speaking person.
Original: She made the medal-portraits to the celebration of the anniversary of the wedding of the king and queen , and she was hired by the US government to make the medal of George Washington at the centenary ( hundred years anniversary ) of the end of the war of independence in 1883 , and to the celebration of Christopher Columbus ' discovery of America in 1892 .
Simplified: She made the medal-portraits to the celebration of the anniversary of the king and queen , and she was hired by the US government to make the medal of George Washington at the centenary ( hundred years anniversary ) of the end of the war of independence in 1883 .