Monument to Decay

Intervention on the floor, Aula of the Academy of Media Arts Cologne.
Text written with paint that glows in the dark (bold below). After a couple of minutes in the dark it starts to fade away until it disappears.
Text source: quote by W.G.Sebald
2013

An idiosyncrasy peculiar to the herrings is that, when dead, it begins to glow; this property, which resembles phosphorescence and is yet altogether different, peaks a few days after death and then ebbs away as the fish decays.  Around 1870, when projects for the total illumination of our cities were everywhere afoot, two English scientists with the apt names of Herrington and Lightbrown investigated the unusual phenomenon in the hope that the luminous substance exuded by dead herrings would lead to a formula for an organic source of light that had the capacity to regenerate itself. The failure of this eccentric undertaking, as I read some time ago in a history of artificial light, constituted no more than a negligible setback in the relentless conquest of darkness.

W.G. Sebald, The Rings of Saturn, Frankfurt a.M. (1995).