Amsterdam-Centrum , North Holland, Netherlands — Northwestern Europe

Emma Trosse

— Walk of Pride Amsterdam —

Photographed by Andrew Ruppenstein, August 31, 2026

1. Emma Trosse Marker

Inscription. Click to hear the inscription.

Emma Trosse
1863-1949
zij/haar she/her

De Duitse Emma Trosse was de eerste vrouw die een wetenschappelijk werk schreef over seksuele diversiteit. Hierin besteedde ze ook aandacht aan het bestaan van aseksualiteit. Zelf identificeerde ze zich als aseksueel persoon.

German educator Emma Trosse was the first woman to write a scientific treatise on the topic of sexual diversity. It was also in that work that she established the concept of asexuality. She identified as asexual herself.

Erected 2026 by Walk of Pride Amsterdam. (Marker Number 11.)

Topics and series. This historical marker is listed in these topic lists: Science & Medicine • Women. In addition, it is included in the Walk of Pride Amsterdam series list. A significant historical date for this entry is January 6, 1863.

Location. 52° 22.402′ N, 4° 53.332′ E. Marker is in Amsterdam, Noord-Holland (North Holland). It is in Amsterdam-Centrum. It is at the intersection of Raadhuisstraat and Singel, on the right when traveling west on Raadhuisstraat. Touch for map. Marker is in this post office area: Amsterdam, Noord-Holland 1012 VK, Netherlands.

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Regionally, it is in Europe,

the European Union,

Atlantic Europe,

the Benelux Low Countries,

the Schengen Area,

Western Europe,

and the Western World.

Historically, it finds itself in what was once the Holy Roman Empire.

Other nearby markers. At least 8 other markers are within walking distance of this marker: Sarah Hegazi (within shouting distance of this marker); Xulhaz Mannan (within shouting distance of this marker); FannyAnn Eddy (within shouting distance of this marker); David Kato (within shouting distance of this marker); Edgar Caïro (within shouting distance of this marker); Xica Manicongo (within shouting distance of this marker); Gesina Dekker (within shouting distance of this marker); Georgina Beyer (about 120 meters away, measured in a direct line). Touch for a list and map of all markers in Amsterdam.

Also see . . . Emma Trosse (Wikipedia). Overview:

Emma Trosse (6 January 1863 – 23 July 1949) was a German teacher and school administrator. Trained as a teacher and later passing an examination to be a principal, Trosse began her career working in public schools and as a private
Photographed by Andrew Ruppenstein, August 31, 2026

2. Emma Trosse Marker - wide view
tutor. In 1895, she published one of the first scientific works on homosexuality and advocated for legal protections for homosexuals. She was the first known woman to scientifically discuss lesbianism. She also published books analyzing ancient medical practices in medieval Europe, and among the Greeks and Egyptians. After her marriage, she became a clinician in her husband's diabetes clinic, and began writing literature on diabetes.

(Submitted on September 1, 2026.)

Credits. This page was last revised on September 1, 2026. It was originally submitted on September 1, 2026, by Andrew Ruppenstein of Lamorinda, California. This page has been viewed 4 times since then. Photos: 1, 2. submitted on September 1, 2026, by Andrew Ruppenstein of Lamorinda, California.