Simplify the following text for a Grade 6 native English-speaking person.
Original: At 16 she was married off to Karl Otto Georg von Meck , a 28-year-old engineer and son of major Otto Adam von Meck and Wilhelmine Hafferberg - a Baltic German family from Riga .
Simplified: When she was 16 it was arranged for her to marry Karl von Meck , a 28-year-old engineer .