Editing 1591 (section)

=== April&ndash;June ===
* [[April 10]]
**The emancipation of Filipino slaves in the Spanish Philippines along with reparations to former slaves, with the threat of excommunication of any Spanish slaveholder who refuses to comply, is ordered by Pope Gregory XIV in the [[papal bull]] ''Cum Sicuti''.<ref name=Ott/>
**[[English people|English]] merchant [[James Lancaster]] sets off on a voyage to the [[East Indies]].<ref name="Cassell's Chronology">{{cite book|last=Williams|first=Hywel|title=Cassell's Chronology of World History|url=https://archive.org/details/cassellschronolo0000will/page/233|url-access=registration|location=London|publisher=Weidenfeld & Nicolson|year=2005|isbn=0-304-35730-8|pages=[https://archive.org/details/cassellschronolo0000will/page/233 233–238]}}</ref>
* [[April 21]] &ndash; Japanese [[Japanese tea ceremony|tea-master]] [[Sen no Rikyū]] commits [[seppuku]], on the order of [[Toyotomi Hideyoshi]].
* [[May 15]] &ndash; In [[Tsardom of Russia|Russia]], [[Tsarevich Dmitry Ivanovich of Russia (born 1582)|Tsarevich Dimitri]], son of [[Ivan the Terrible]], is found dead in mysterious circumstances, at the palace in [[Uglich]]. The official explanation is that he has cut his own throat during an epileptic seizure. Many believe he has been murdered by his rival, [[Boris Godunov]], who becomes tsar.
* [[May 24]] &ndash; Sir [[John Norris (soldier)|John Norreys]], with an expeditionary force sent by Queen [[Elizabeth I]] of England, takes the town of [[Guingamp]] in Brittany after a brief siege, on behalf of [[Henry IV of France|Henry of Navarre]].
* [[May 30]]
** [[Timbuktu]] is captured by an expedition of [[Arma people]] sent by the [[Saadi dynasty|Saadi]] ruler of [[Morocco]] and led by [[Judar Pasha]].
** [[Zutphen]] is [[Siege of Zutphen (1591)|captured]] by the Dutch and English, under [[Maurice of Nassau]].
* [[June 10]] &ndash; [[Deventer]] is [[Siege of Deventer (1591)|captured]] by the Dutch, under Maurice of Nassau.
* [[June 26]] &ndash; The [[Capture of Delfzijl|siege of the Spanish Netherlands city]] of [[Delfzijl]] is started by [[Maurice, Prince of Orange]], stadtholder of the [[Dutch Republic]], who leads a Dutch and English Army against the Spanish defenders. Delfzijl falls after six days, and is surrendered on July 2.