308 B.c. – Foundation of Óbidos by the Celts.
1st century – The Romans conquer Óbidos.
5th- 6th century – Visigoth occupation.
8th century – Arab occupation.
1148 – On January 11, King Afonso Henriques, the first king of Portugal, conquers Óbidos from the Moors (Municipal Holiday).
1195 – The first Town Charter of Óbidos is probably granted.
1210 – King Afonso II bestows the town of Óbidos to his wife Queen Urraca.
1246 – By keeping faithful to King Sancho II, Óbidos ensures the title of Mui Nobre e Sempre Leal (Very Noble and Always Loyal) that it holds until today.
1282 – King Dinis and Queen Isabel spend their nuptials in Óbidos. With the donation of the town as a wedding gift, it becomes part of the Queen’s dowry until 1834.
1309 – Queen Isabel comes to Óbidos and orders the construction of the Chapel of Saint Vincent (later Saint John the Baptist Church) and institutes, in this same chapel, the brotherhood of the Holy Spirit. She also orders the construction of the houses next to the chapel for those who suffered from leprosy.
1422 – King João I signs a decree that changes the Roman to the Christian calendar.
1441 - The marriage of the Royal Prince Afonso (V) to Isabel (10 and 8 years old respectively) takes place in St. Mary’s Church.
1491 – Queen Leonor, wife of King João II, comes to Óbidos to mourn the death of her son, the royal Prince Afonso.
1498 – Queen Leonor founds the Almshouse of Óbidos.
1513 – King Manuel I grants the town a new Charter.
1527 – King João III institutes the teaching of Mathematics and Theology, in Óbidos.
1560 – King-Cardinal Henrique, when passing through the town of Óbidos, orders the construction of a monastery, of the Order of Saint Francis, on the site where, today, Saint Michael’s Estate is located.
1573 – Queen Catarina orders the construction of the Aqueduct and St. Mary’s fountain as well as the fountains in the outskirts of town.
1661 – The retable of “St. Catherine’s Mystical Wedding” is painted by Josefa de Óbidos for St. Mary’s Church.
1684 – Josefa d‘Óbidos dies on July 22nd.
1755 – The town of Óbidos is severely damaged by the Lisbon earthquake.
1808 – The first gun shots, which started the Battle of Roliça during the French Invasions, are fired from Óbidos. Here, Napoleon endures his first defeat in the Peninsular War.
1834 – Extinction of the House of Queens.
1900/ 1910 – King Carlos hunts in the Lagoon of Óbidos with Rev. António Almeida, chaplain of Our Lord Jesus of the Stone Sanctuary.
1910/ 1950 – The Town Walls are restored.
1973 – The first preparatory meeting that led to the 25th of April revolution in 1974 took place in Óbidos.