Navigium Isidis

The Navigium Isidis or Isidis Navigium (trans. the vessel of Isis) was an annual ancient Roman religious festival in honor of the goddess Isis, held on March 5. The festival outlived Christian persecution by Theodosius (391) and Arcadius` persecution against the Roman religion. In the Roman Empire, it was still celebrated in Italy at least until ....
Found on http://en.wikipedia.org/wiki/Navigium_Isidis
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