Christian Martin Julius Frauenstädt (born at Bojanowo

Bojanowo

Bojanowo is a town in Rawicz County, Greater Poland Voivodeship, Poland. During the Partitions of Poland, the town was in the Kreis Rawitsch, Provinz Posen.-External links:* * * *...

, Posen, April 17, 1813; died at Berlin

Berlin

Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

 January 13, 1879) was a German

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 student of philosophy

Philosophy

Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

. He was educated at the house of his uncle at Neisse

Nysa, Poland

Nysa is a town in southwestern Poland on the Nysa Kłodzka river with 47,545 inhabitants , situated in the Opole Voivodeship. It is the capital of Nysa County. It comprises the urban portion of the surrounding Gmina Nysa, a mixed urban-rural commune with a total population of 60,123 inhabitants...

, and converted from Judaism

Judaism

Judaism ) is the "religion, philosophy, and way of life" of the Jewish people...

 to Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

 in 1833. Studying theology

Theology

Theology is the systematic and rational study of religion and its influences and of the nature of religious truths, or the learned profession acquired by completing specialized training in religious studies, usually at a university or school of divinity or seminary.-Definition:Augustine of Hippo...

 and, later, philosophy at Berlin

Humboldt University of Berlin

The Humboldt University of Berlin is Berlin's oldest university, founded in 1810 as the University of Berlin by the liberal Prussian educational reformer and linguist Wilhelm von Humboldt, whose university model has strongly influenced other European and Western universities...

, he formed the acquaintance of Schopenhauer, and took up his residence in Berlin in 1848.

Frauenstädt was a disciple of Arthur Schopenhauer

Arthur Schopenhauer

Arthur Schopenhauer was a German philosopher known for his pessimism and philosophical clarity. At age 25, he published his doctoral dissertation, On the Fourfold Root of the Principle of Sufficient Reason, which examined the four separate manifestations of reason in the phenomenal...

, as is shown by his works. He wrote:

• "Studien und Kritiken zur Theologie und Philosophie," Berlin, 1840
• "Ueber das Wahre Verhältniss der Vernunft zur Offenbarung," Darmstadt, 1848
• "Aesthetische Fragen," Dessau, 1853
• "Die Naturwissenschaft in Ihrem Einfluss auf Poesie, Religion, Moral, und Philosophie," ib. 1855
• "Der Materialismus, Seine Wahrheit und Sein Irrthum," ib. 1856 (written against Ludwig Büchner
  Ludwig Büchner
  Friedrich Karl Christian Ludwig Büchner was a German philosopher, physiologist and physician who became one of the exponents of 19th century scientific materialism.Büchner was born at Darmstadt, Germany, on 29 March 1824...
  
  )
• "Briefe über die Natürliche Religion," ib. 1858
• "Lichtstrahlen aus ImmanuelKant's Werken," ib. 1872.

Schopenhauer made Frauenstädt his literary executor

Literary executor

A literary executor is a person with decision-making power in respect of a literary estate. According to Wills, Administration and Taxation: a practical guide "A will may appoint different executors to deal with different parts of the estate...

, to undertake the editing of his works. Among Frauenstädt's works relating especially to Schopenhauer are:

• "Briefe über die Schopenhauer'sche Philosophie," Leipzig, 1854
• "Lichtstrahlen aus Schopenhauer's Werken," ib. 1862, 7th ed. 1891 (with Otto Lindner)
• "Schopenhauer, von Ihm und über Ihn," Berlin, 1863
• "Aus Schopenhauer's Handschriftlichem Nachlass," Leipzig, 1864
• "Das Sittliche Leben," ib. 1866
• "Blicke in die Intellektuelle, Physische, und Moralische Welt," ib. 1869; "Schopenhauer-Lexikon," ib. 1871
• "Neue Briefe über die Schopenhauer'sche Philosophie," ib. 1876.

He edited "Gesammtausgabe der Werke Schopenhauer's," 6 vols., ib. 1873–74, 2d ed. 1877.