Piaget, Jean. 1896-1980. Swiss psychologist. Child development in four stages: sensorimotor, symbolic, concrete, logical.

Piast. 840-1370. Polish dynasty.

Piazzi, Giuseppe. 1746-1826. Italian discoverer of Ceres, first asteroid seen by man 1801.

Picard, Jean. 1620-82. French astronomer. Founded Paris Observatory. Computed size of earth.

Picasso, Pablo. 1881-1973. Spanish/French Cubist painter. Desmoiselles d’Avignon 1907. Guernica 1937.

Piccard, Auguste. 1884-1962. Swiss physicist. Balloon to stratosphere. Bathyscaphe below ocean.

Pichincha, Battle. 1822. Ecuador wins independence from Spain.

Pickens, Andrew. 1739-1817. American Revolutionary. Captured Atlanta.

Pickering, Edward. 1846-1919. US pioneer of stellar spectroscopy, photometry.

Pickford, Mary. 1893-1979. Canadian/US silent film actress.

Picquart, Georges. 1854-1914. French general imprisoned for defense of Dreyfus.

Picquigney, Truce. 1475. France pays England to withdraw army.

Picts. Inhabitants of Scotland. Repelled Romans. Subdued by MacAlpin 843 creating Alban.

Pied Piper of Hamelin. Legend based on Children’s Crusade. Leads children away when townspeople refuse to pay for ridding town of vermin.

Piedmont-Sardinia. 1720-1861. Savoy kingdom. Sardinia.

Pierre de Montreuil. 13 C builder of Notre-Dame Cathedral, architect of Ste-Chapelle, 1248.

Pietism. 17-18C. Spener’s religious movement. Influenced Moravians, Methodists. Bible study.

Pigalle, Jean-Baptiste. 1714-85. French sculptor. Mercury 1744.

Pilate, Pontius. -c39. Roman governor of Judea, who allowed Christ’s crucifixion.

Pilâtre de Rosier, Jean-François. 1756-85. Physician and balloonist. First ascent 1783 with Montgolfier; First free flight 1783 with d’Arlandes. Killed trying to cross Channel.

Pilgrim Fathers. 1620. English religious Separatists who sailed on Mayflower to avoid persecution.

Pilgrimage of Grace. 1536. Catholic uprising in Lincolnshire and Yorkshire against dissolution of monasteries, taxation and inflation.

Pillars of Hercules. Rock of Gibraltar and Jebel Musa.

Pillnitz, Declaration of. 1791. Holy Roman Empire, Prussia support Restoration in France. French Revolutionary Wars.

Pilon, Germain. c1537-90. Fench. sculptor. Three Graces 1561.

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