Johann Weißheimer II was the father of the composer Wendelin Weißheimer.
Around the middle of the 19th century, he was one of the most heavily taxed landowners in Rheinhessen.
He was also a politician and mayor of Osthofen in the first chamber stalls of the Hesse state parliament during the 1848 revolution.
His extensive diaries tell nearly 80 years of his life, documenting economic, political, social and climatic conditions.
They are considered the most important primary sources about Osthofen and also of the Rhenish-Hessian history in the 19th century.
Because of his extensive studies, he is also called the "chronicler" of Osthofen.