Rome had trading ports in the Mumbai region of India with 120 ship-voyages a year from Roman Egypt at the peak . Chinese plates from this trade have been found in the mud of the Thames river London. Here is evidence for Greek-Roman voyages to Bali Indonesia over 2000 years ago. A book by Jesuit priest da Volta 500 years ago "A Voyage to Moluccas" described trading boats with a dragon-head having many paddlers( which suggests Viking boats). The priest was reminded of the boats used in Lisbon Portugal for Corpus Christi ceremonies.