In the years before World War I, Kafka frequented the science society’s lectures organized by Berta Fanta in her house no. 3 on the Old Town Square, a house marked by the relief of a unicorn on the front façade. This was the meeting place of leading intellectuals who presented new concepts in many scientific fields (psychoanalysis, theory of relativity, transfinite numbers, quantum theory and others). In addition to Kafka, frequent visitors included physicist Phillip Frank, philosopher Christian von Ehrenfels, mathematician Gerhard Kowalewski, the founder of anthroposophy Rudolf Steiner, and even Albert Einstein, who was lecturing in Prague at the time.