Events January–March January 23 – Thirty Years' War: Sweden and France sign the Treaty of Bärwalde, a military alliance in which France provides funds for the Swedish army invading northern Germany. February 5 – Puritan leader Roger Williams arrives in Boston. February 16 – The Reval Gymnasium is founded in Tallinn, Estonia, by Swedish king Gustavus II Adolphus. February 20 – A fire breaks out in Westminster Hall, but is put out before it can cause serious destruction. March 7 – Ambrósio I Nimi a Nkanga, the ruler of the Kingdom of Kongo (in what is now Angola) dies after a reign of five years. March 10 – Al Walid ben Zidan becomes the new Sultan of Morocco upon the death of Abu Marwan Abd al-Malik II. March 20 – The siege of the Protestant German city of Magdeburg by the Catholic League begins and lasts for more than two months before the city falls and the inhabitants are massacred. April–June April 13 – Thirty Years' War: Gustavus Adolphus of Sweden defeats an imperial garrison at the city of Frankfurt an der Oder. May 18 – In Dorchester, Massachusetts, John Winthrop takes the oath of office, and becomes the first Governor of Massachusetts. May 20 – Thirty Years' War: After a two-month siege, an Imperial army under the command of Tilly storms the German city of Magdeburg, and brutally sacks it, massacring over 20,000 inhabitants. Shocked by the massacre, many Protestant states in the Holy Roman Empire decide to ally with Gustavus Adolphus of Sweden, and support his ongoing invasion. May 28 – William Claiborne sails from England to establish a trading post on Kent Island, the first English settlement in Maryland. May 30 Thirty Years' War: Bavaria and France sign the Treaty of Fontainebleau, forming a secret alliance; however, this does not last long. Gazette de France, the first weekly French newspaper, is published. June 17 – The death in childbirth of Mumtaz Mahal at Burhanpur causes her husband Shah Jahan to commission the Taj Mahal at Agra, as a mausoleum for her. Construction is started in 1632, and finished in 1653. June 19 – War of the Mantuan Succession: The Treaty of Cherasco is signed, ending the War of the Mantuan Succession. June 20 – Algerian pirates sack Baltimore, County Cork, in Ireland. July–September July 9 – Koca Musa Pasha, the Ottoman Governor of Egypt, arranges the murder