Chipperfield introducing performing animals to the country at the Frost Fair on the Thames in London. February 24 – A treaty is signed between European German colonists in Brandenburg-Prussia, and the African chiefs at Ghana in what is now Ghana to permit the German colonists to build a second fort on the Brandenburger Gold Coast, and the fortress of Dorotheenschanze is built. The area is now the Ghanaian city of Akwida. March 5 – Pope Innocent XI forms a Holy League with the Habsburg Empire, Venice and Poland, to end Ottoman Turkish rule in Europe. March 19 – In Japan, the Tenna era ends on the 21st day of the 2nd month of the Chinese calendar of the 4th year of the Tenna era and the Jōkyō era begins as Japan's royal astronomer, Shibukawa Shunkai institutes the Jōkyō calendar to replace Chinese calendar which had been used in Japan since 859 AD, after calculating that the length of the solar year is 365.2417 days. April–June April 25 – The Morean War begins as the Republic of Venice declares war on the Ottoman Empire for control of the Peloponnese area of Greece, a peninsula which includes Corinth and Sparta and has been referred to by the Ottomans as Morea. May 18 – The French Navy begins a 10-day bombardment of the Italian city of Genoa in the course of the War of the Reunions between France and the Republic of Genoa. During the fight, the French fleet, commanded by Abraham Duquesne, fires almost 13,000 cannonballs, pausing only during a cease-fire on May 21 and May 22, and uses the new technology of explosive bombs. When the bombardment ends on May 28, two-thirds of the city has been destroyed or damaged. June 7 – After a siege of six weeks that began on April 27, Luxembourg City is taken by the French Army from control by Spain, and the Grand Duchy of Luxembourg, previously part of the Spanish Netherlands (now Belgium) is acquired by France. June 27 – Francisco de Távora, the Viceroy of Portuguese India, a small colony located in southwestern India at Goa, issues an order prohibiting indigenous residents from speaking their native language, Konkani, and directs them to learn Portuguese within the next three years. July–September July 21–August 6 – Morean War: Siege of Santa Maura – The Republic of Venice captures the Ottoman island fortress of Santa Maura.