Francesco di Giorgio Martini was an Italian architect, engineer, painter, sculptor, and writer. As a painter, he belonged to the Sienese School. He was considered a visionary architectural theorist—in Nikolaus Pevsner's terms: "one of the most interesting later Quattrocento architects". As a military engineer, he executed architectural designs and sculptural projects and built almost seventy fortifications for the Federico da Montefeltro, Count of Urbino, building city walls and early examples of star-shaped fortifications.
Born in Siena, he apprenticed as a painter with Vecchietta. In panels painted for cassoni he departed from the traditional representations of joyful wedding processions in frieze-like formulas to express visions of ideal, symmetrical, vast and all but empty urban spaces rendered in perspective.
He composed an architectural treatise Trattato di architettura, ingegneria e arte militare, the third of the Quattrocento, after Leone Battista Alberti's and Filarete's; he worked on it for decades and finished sometime after 1482; it circulated in manuscript.
James Connolly was a Scottish-born Irish republican and socialist leader.
Connolly was born in the Cowgate area of Edinburgh, Scotland, to Irish parents. He left school for working life at the age of 11. He also took a role in Scottish and American politics. He was a member of the Industrial Workers of the World and founder of the Irish Socialist Republican Party. With James Larkin, he was centrally involved in the Dublin lock-out of 1913, as a result of which the two men formed the Irish Citizen Army that year. He opposed British rule in Ireland, and was one of the leaders of the Easter Rising of 1916. He was executed by firing squad following the Rising.
The Warsaw Uprising was a major World War II operation, in the summer of 1944, by the Polish underground resistance, led by the Polish resistance Home Army, to liberate Warsaw from German occupation. The uprising was timed to coincide with the retreat of the German forces from Poland ahead of the Soviet advance. While approaching the eastern suburbs of the city, the Red Army temporarily halted combat operations, enabling the Germans to regroup and defeat the Polish resistance and to destroy the city in retaliation. The Uprising was fought for 63 days with little outside support. It was the single largest military effort taken by any European resistance movement during World War II.
The Uprising began on 1 August 1944 as part of a nationwide Operation Tempest, launched at the time of the Soviet Lublin–Brest Offensive. The main Polish objectives were to drive the Germans out of Warsaw while helping the Allies defeat Germany. An additional, political goal of the Polish Underground State was to liberate Poland's capital and assert Polish sovereignty before the Soviet-backed Polish Committee of National Liberation could assume control.