Zacchaeus (sometimes spelled Zaccheus; Ancient Greek: Ζακχαῖος, Zakchaîos; Classical Syriac: ܙܰܟ݁ܰܝ, romanized: Zakay, "pure, innocent")[1] was a chief tax-collector at Jericho in the Bible.

When Jesus reached the spot he looked up at the sycamore tree (actually a sycamore-fig Ficus sycomorus[7]), addressed Zacchaeus by name, and told him to come down, for he intended to visit his house.

At Er-riha (Jericho) there is a large, venerable looking square tower, which by tradition is named the House of Zacchaeus.

[citation needed][dubious – discuss] Clement of Alexandria refers once to Zacchaeus in a way which could be read as suggesting that some identified him with apostle Matthew or Matthias.

In Southern Bavaria, a red banner with a white cross may be flown outside a Church on its anniversary, which is consequently called the Zacchaeus flag.