Which of these businesses, still operating today, was originally established during ancient times (before 500 CE)?

The ancient world wasn't just about monuments and conquests - it was also where some of the earliest businesses were born. Remarkably, a few companies founded in ancient times have survived through centuries of wars, plagues, and industrial revolutions to still operate today. This trivia explores one extraordinary example of brand longevity that connects us directly to our ancient past. Can you identify which of these businesses has been continuously operating since ancient times?

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Kongo Gumi (Japanese construction company founded in 578 CE)
Staffelter Hof (German winery established in 862 CE)
Nishiyama Onsen Keiunkan (Japanese hotel founded in 705 CE)
Kongō Gumi (Japanese construction company founded in 578 BCE)