The Lighthouse-Monolith is a windowless green-blue stone tower, 30–40 m tall, at the center of Serpent Island in Uchronic Paris. It signals light to sky and water and acts as a temporal projection mechanism that compels its occupants into the role of Uchronic Guards, bound to carry out historical assassinations.
Its single entrance is a pivoting stone door opened by two skulls. The Vienna Secession interior (goddess Hygieia with serpent) has four floors:
- Combat chambers and an illusory wall.
- A library of about 1,000 volumes on magic, philosophy and physics.
- A workshop with an eight-pointed star and prophetic murals by Gustavo, the mad artist, who offers choices between violence and peace and knows of the Black Hand.
- The Simultaneous Circle (10–15 m, four quadrants), where Serbian revolutionaries of the Circle of the Serpent performed the ritual that projected the group to Sarajevo, 28 June 1914.
A deep naga guards it. Its design follows Olbrich’s Secession Building (1897) and Klimt’s murals; Gustavo is Gustav Mahler recast.