Theodor Kerckring

The 22-year old Theodore Kerckring by Jurgen Ovens (1660).^[1]

Theodor Kerckring or Dirk Kerckring (sometimes Kerckeringh or Kerckerinck) (baptized 22 July 1638 - 2 November 1693) was a Dutch anatomist and chemical physician.^[2]

Kerckring was born as the son of the Amsterdam merchant and VOC captain Dirck Kerckring and Margaretha Bas (daughter of Dirck Bas, a former mayor of Amsterdam).^[3] In the second half of the 1650s he was a pupil at the Latin School in Amsterdam of Franciscus van den Enden (at the same time as the philosopher Benedictus de Spinoza), before studying medicine at Leiden University under Franciscus Sylvius. Around 1660 he was painted by Jurgen Ovens. In 1667 he was visited by Cosimo III de' Medici, interested in new developments in science and curious to see his collection of anatomical objects.

Several sources reveal that Kerckring remained on good terms with Van den Enden, whose daughter Clara Maria he married in 1671. In order to marry the 27 year old woman, who had a limp, Kerckring became a Roman Catholic.^[4] She helped her father teach Latin and Spinoza seems to have been interested in her.

Although further details of his early life are sketchy, it is known that he spent much of his medical career prior to 1675 in Amsterdam at Singel. Afterwards he travelled throughout continental Europe, settling in Hamburg in 1678. (He owned a few houses and a chapel, which do not exist anymore, since the Hamburg Hauptbahnhof was built there). In 1683 he invited his old friend Niels Stensen, once one of the leading anatomists but converted to catholicism. Nielsen, becoming a priest in Florence and bisshop in Münster, needed new position. Kerckring helped Stensen with an appointment in Hamburg and Stensen asked the Duke of Tuscany, Cosimo III de' Medici to help Kerckring with a post. Then both men were able to share experiences and ideas.

Spicilegium

Kerckring is remembered for his Spicilegium anatomicum, which is an anatomical atlas of clinical observations, medical curiosities, autopsy discoveries along with general anatomical information.^[5] He is credited with describing Kerckring's ossicles, which is an occasional ossification centre in the occipital bone that appears around the 16th week of gestation. He also provided a comprehensive description of the folds of the mucous membrane of the small intestine. These anatomical folds go by several different names, including the valves of Kerckring, Kerckring's folds, plicae circulares and valvulae conniventes. Kerckring used a microscope made by Spinoza.

Works

• Theodori Kerckringii ... Opera Omnia Anatomica : Continentia Specilegivm Anatomicvm, Osteogeniam Foetvvm Nec Non Anthropogeniæ Ichnographiam ; Accuratissimis Figuris æri incisis illustrata. - Editio secunda. - Lugduni Batavorum
• Commentarius in currum triumphalem Antimonii Basilii Valentini, a se latinitate donatum. - Amstelodami: Sumptibus Andreæ Frisii, 1671.
• The Triumphal Chariot Of Antimony / By Basilius Valentinus. With the commentary of Theodore Kerckringius, being the Latin version publ. at Amsterdam ... 1685, transl. into English and German

External links

• The Triumphal Chariot Of Antimony
• http://www.mbamericana.com/othercategories.medical.htm
• http://www.ritmanlibrary.nl/c/p/h/bel_50.html

References

1. ^ Middelkoop, N. (2010) Een Amsterdammer in Hamburg, een Noord-Duitser in Amsterdam, p. 163-169. In: Maandblad Amstelodamum, 79-4
2. ^ Baptismal record
3. ^ Margaret Gullan-Whur, Jabic Veenbaas Spinoza: een leven volgens de rede, Lemniscaat Publishers 2000, p. 100
4. ^ Kooymans, L. (2007) Gevaarlijke kennis, p. 325-326.
5. ^ Kerckring and the Spicilegium anatomicum.

Persondata
Name	Kerckring, Theodor
Alternative names
Short description
Date of birth	1639
Place of birth
Date of death	2 November 1693
Place of death