The year 1671 in science and technology involved some significant events.

Astronomy

• Completion of Paris Observatory, the world's first such national institution.^[1]

Mathematics

• publishes Kokin-Sanpo-Ki ( ), in which he gives the first comprehensive applied account of Chinese algebra in Japan.

Births

• October 1 - Guido Grandi, Italian mathematician (died 1742)

Deaths

• June 25 - Giovanni Battista Riccioli, Italian astronomer (born 1598)

References

fr:1671 en science mk:1671