noun

• (chiefly British) A building or place housing shops or stalls where all sorts of (especially exotic) manufactured articles are collected for sale.
  "It is plain, that such writers do not rise to the very idea of a University. They consider it a sort of bazaar, or pantechnicon, in which wares of all kinds are heaped together for sale in stalls independent of each other; and that, to save the purchasers the trouble of running about from shop to shop; or an hotel or lodging house, where all professions and classes are at liberty to congregate, varying, however, according to the season, each of them strange to each, and about its own work or pleasure; […]"
• (chiefly British) Originally pantechnicon van: a van, especially a large moving or removal van.
  "For we do not employ battleships as convoys, nor even as pantechnica conveying landing parties."