Since the 1980s hundreds of cryptic plaques have appeared across the streets of America. Embedded in the asphalt, the material forming the tiles remains mysterious. Likely made of layers of linoleum, tar paper, and asphalt crack-filling compound, each plaque begins life as a dark black smudge, slowly curing before wear uncovers the message hidden beneath.
Their name’s origin, given for the title “Toynbee Idea” that heads most of the plaques, holds its own mystery. Guesses include reference to British historian, author, and historical philosopher Arnold J. Toynbee and Ray Bradbury’s short story The Toynbee Convector about a time traveller.
With the Toynbee Tiles’ confounding message to ‘resurrect dead on planet Jupiter’ and making reference to ‘Kubrick’s 2001’, countless minds have been captivated by the curious installations, seeking meaning and answers.
Allegedly the address of one Severino “Sevy” Verna was found on a Toynbee tile in Chile. Verna was recalled by neighbours as having “a car with a large antenna and the floor removed from the passenger seat“, perfect for covert installations and disrupting radio signals. Smaller tiles were also found on the streets around his home assumed to be practise pieces. However, the reason for the creations is still unknown, and their maker has never officially been discovered.
Adding to the mystery, a new crop of street plaques in similar Toynbee style began to appear. Headed with ‘House of Hades’, these modern iterations feature more pointed and varied messages, mostly directed to the American public.
Some, tagged with a simple HOH and a date, have no written message, appearing only as art pieces. House of Hades tiles have been found all across the states and South America, with one even reaching Tokyo. They are presumed to be the work of multiple people and Toynbee copycats, but the mystery remains.
Further reading and watching:
Resurrect Dead
The Enduring Urban Mystery of the Toynbee Tiles
House of Hades Returns
Toynbee Tiles
Toynbee Idea
A new post by Hanna Simpson, Diary of a Tile Addict, June 2025.