The original encaustic tiles in the Capitol extensions were manufactured at Stoke-upon-Trent in Staffordshire, England, by Minton, Hollins and Company. The firms patented tiles had won numerous gold medals at international exhibitions and were considered the best tiles made.

Where were Minton tiles made?

Stoke-upon-Trent The firm began in 1793 when Thomas Minton (1765–1836) founded his pottery factory in Stoke-upon-Trent, Staffordshire, England as Thomas Minton and Sons, producing earthenware.