Bolinus brandaris, the spiny dye-murex used for Tyrian purple · Wikimedia Commons

Tyrian Purple Dye Works, Tyre

Purpura Tyria

MonumentSyria · Tyre (Sour), LebanonBuilt 1500 BCE

About

Tyre gave its name to Tyrian purple, the violet-red dye pressed from the crushed glands of thousands of murex sea snails and prized as antiquity's costliest color. Shell mounds many meters deep, still visible along Tyre's shoreline, mark centuries of industrial-scale crushing and dyeing. Producing a single gram of dye took as many as twelve thousand mollusks, and under Rome the color became the exclusive mark of imperial rank, worth more than its weight in gold. By 117 CE Tyre's dye works had already supplied kings and emperors for well over a thousand years.

What happened here

It was put up to be argued with. Public monuments carry an inscription at eye height naming who paid, what for, and by whose authority, because being read is the whole return on the investment. People meet at them, give directions by them, and shelter under them. Children climb them. The bronze fittings are stolen often enough that they are re-attached with lead. On anniversaries the base is garlanded and the local council makes a short speech nobody listens to. Monuments also date the town for you: a run of them along one street shows which families were rising in which decade, and which ones stopped. When a family falls out of favour, the name is chiselled out and the stone is quietly reused.