Question: When is Margarete Weißkirchner's husband's birthday?

Knowledge 1: Margarete Weißkirchner
Margarete Weißkirchner (1460-1500), was the common-law-spouse of Philip I, Count of Hanau-Münzenberg from 1477 until their death in 1500.They openly lived together after the death of Philip's spouse in 1477.They could not marry, because she was a commoner.Margaret was not considered Philip's royal mistress, but was treated as if though they were married.He appeared with her in public.The most representative testimony is probably the first large-scale double-portrait in art history, the so-called "Gotha Lovers".Their relationship is exceptionally well documented.The couple had three children:
These children could not inherit the county, because they did not belong to the high nobility.Nevertheless, Philip and Margareta included them in their will. [SEP] Knowledge 2: Philipp I, Count of Hanau-Münzenberg
Count Philipp I of Hanau-Münzenberg, nicknamed "Philipp the Younger", (20 September 1449, at Windecken Castle – 26 August 1500)was a son of Count Reinhard III of Hanau and Countess Palatine Margaret of Mosbach.He was the Count of Hanau from 1452 to 1458.The county was then divided between him and his unclePhilipp the Elder.Philipp the Youngerreceived Hanau-Münzenberg and ruled there from 1458 until his death.
Knowledge 1: Margarete Weißkirchner
Margarete Weißkirchner (1460-1500), was the common-law-spouse of Philip I, Count of Hanau-Münzenberg from 1477 until their death in 1500.They openly lived together after the death of Philip's spouse in 1477.They could not marry, because she was a commoner.Margaret was not considered Philip's royal mistress, but was treated as if though they were married.He appeared with her in public.The most representative testimony is probably the first large-scale double-portrait in art history, the so-called "Gotha Lovers".Their relationship is exceptionally well documented.The couple had three children:
These children could not inherit the county, because they did not belong to the high nobility.Nevertheless, Philip and Margareta included them in their will. [SEP] Knowledge 2: Etan Boritzer
Etan Boritzer( born 1950) is an American writer of children ’s literature who is best known for his book" What is God?" first published in 1989.His best selling" What is?" illustrated children's book series on character education and difficult subjects for children is a popular teaching guide for parents, teachers and child- life professionals.Boritzer gained national critical acclaim after" What is God?" was published in 1989 although the book has caused controversy from religious fundamentalists for its universalist views.The other current books in the" What is?" series includeWhat is Love?,What is Death?,What is Beautiful?,What is Funny?,What is Right?,What is Peace?,What is Money?,What is Dreaming?,What is a Friend?,What is True?,What is a Family?,What is a Feeling?"The series is now also translated into 15 languages.Boritzer was first published in 1963 at the age of 13 when he wrote an essay in his English class at Wade Junior High School in the Bronx, New York on the assassination of John F. Kennedy.His essay was included in a special anthology by New York City public school children compiled and published by the New York City Department of Education.Boritzer now lives in Venice, California and maintains his publishing office there also.He has helped numerous other authors to get published through" How to Get Your Book Published!" programs.Boritzer is also a yoga teacher who teaches regular classes locally and guest- teaches nationally.He is also recognized nationally as an erudite speaker on" The Teachings of the Buddha."
Knowledge 1: Margarete Weißkirchner
Margarete Weißkirchner (1460-1500), was the common-law-spouse of Philip I, Count of Hanau-Münzenberg from 1477 until their death in 1500.They openly lived together after the death of Philip's spouse in 1477.They could not marry, because she was a commoner.Margaret was not considered Philip's royal mistress, but was treated as if though they were married.He appeared with her in public.The most representative testimony is probably the first large-scale double-portrait in art history, the so-called "Gotha Lovers".Their relationship is exceptionally well documented.The couple had three children:
These children could not inherit the county, because they did not belong to the high nobility.Nevertheless, Philip and Margareta included them in their will. [SEP] Knowledge 2: Les Richards
Les Richards( date of birth unknown) was an Australian rules footballer who played with North Melbourne in the Victorian Football League( VFL).

Answer: 20 September 1449