How many years old is the Speyer wine bottle, the world's oldest known unopened bottle of wine, as of 2025?

Answer

1,700 years

Sealed with wax and olive oil around 325-350 AD and found in a Roman tomb near Speyer, Germany, the bottle still contains liquid — scientists debate opening it, but no one has volunteered to take a sip.

Source: Historical Museum of the Palatinate, Speyer / Guinness World Records