On the trail of Carl Zeiss and Ernst Abbe A historical tour of Jena. The entrepreneurs Carl Zeiss and Ernst Abbe shaped modern-day Jena like no other historical figure. To this day, Jena is defined by ZEISS and the Carl Zeiss Foundation. Abbe’s sociopolitical ideas and talent as a scientist continue to have an impact today. Other traces of their lives have since faded. This historical tour takes you to places where their impact on the modern townscape is still visible. Two speakers provide you