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  1. 3 天前 · Statue of Liberty, colossal statue on Liberty Island in the Upper New York Bay, U.S., commemorating the friendship of the peoples of the United States and France.Standing 305 feet (93 metres) high including its pedestal, it represents a woman holding a torch in her raised right hand and a tablet bearing the adoption date of the Declaration of Independence (July 4, 1776) in her left.

    • The Editors of Encyclopaedia Britannica
  2. As the head of the government of the United States, the president is arguably the most powerful government official in the world. The president is elected to a four-year term via an electoral college system. Since the Twenty-second Amendment was adopted in 1951, the American presidency has been

    • The Editors of Encyclopaedia Britannica
    • Overview
    • Early period: Florence
    • First Milanese period (1482–99)

    Leonardo da Vinci was an artist and engineer who is best known for his paintings, notably the Mona Lisa (c. 1503–19) and the Last Supper (1495–98). His drawing of the Vitruvian Man (c. 1490) has also become a cultural icon. Leonardo is sometimes credited as the inventor of the tank, helicopter, parachute, and flying machine, among other vehicles and devices, but later scholarship has disputed such claims. Nonetheless, Leonardo’s notebooks reveal a sharp intellect, and his contributions to art, including methods of representing space, three-dimensional objects, and the human figure, cannot be overstated.

    Read more below: Art and accomplishment: Leonardo as artist-scientist

    How many Leonardo da Vinci paintings are there?

    Leonardo da Vinci’s total output in painting is really rather small; there are less than 20 surviving paintings that can be definitely attributed to him, and several of them are unfinished. Two of his most important works—the Battle of Anghiari and the Leda, neither of them completed—have survived only in copies.

    Read more below: Art and accomplishment: Painting and drawing

    10 Famous Artworks by Leonardo da Vinci

    Leonardo’s parents were unmarried at the time of his birth. His father, Ser Piero, was a Florentine notary and landlord, and his mother, Caterina, was a young peasant woman who shortly thereafter married an artisan. Leonardo grew up on his father’s family’s estate, where he was treated as a “legitimate” son and received the usual elementary education of that day: reading, writing, and arithmetic. Leonardo did not seriously study Latin, the key language of traditional learning, until much later, when he acquired a working knowledge of it on his own. He also did not apply himself to higher mathematics—advanced geometry and arithmetic—until he was 30 years old, when he began to study it with diligent tenacity.

    Leonardo’s artistic inclinations must have appeared early. When he was about 15, his father, who enjoyed a high reputation in the Florence community, apprenticed him to artist Andrea del Verrocchio. In Verrocchio’s renowned workshop Leonardo received a multifaceted training that included painting and sculpture as well as the technical-mechanical arts. He also worked in the next-door workshop of artist Antonio Pollaiuolo. In 1472 Leonardo was accepted into the painters’ guild of Florence, but he remained in his teacher’s workshop for five more years, after which time he worked independently in Florence until 1481. There are a great many superb extant pen and pencil drawings from this period, including many technical sketches—for example, pumps, military weapons, mechanical apparatus—that offer evidence of Leonardo’s interest in and knowledge of technical matters even at the outset of his career.

    Britannica Quiz

    Who Painted the Most Expensive Paintings in the World?

    In 1482 Leonardo moved to Milan to work in the service of the city’s duke—a surprising step when one realizes that the 30-year-old artist had just received his first substantial commissions from his native city of Florence: the unfinished panel painting Adoration of the Magi for the monastery of San Donato a Scopeto and an altar painting for the St. Bernard Chapel in the Palazzo della Signoria, which was never begun. That he gave up both projects seems to indicate that he had deeper reasons for leaving Florence. It may have been that the rather sophisticated spirit of Neoplatonism prevailing in the Florence of the Medici went against the grain of Leonardo’s experience-oriented mind and that the more strict, academic atmosphere of Milan attracted him. Moreover, he was no doubt enticed by Duke Ludovico Sforza’s brilliant court and the meaningful projects awaiting him there.

    Leonardo spent 17 years in Milan, until Ludovico’s fall from power in 1499. He was listed in the register of the royal household as pictor et ingeniarius ducalis (“painter and engineer of the duke”). Leonardo’s gracious but reserved personality and elegant bearing were well-received in court circles. Highly esteemed, he was constantly kept busy as a painter and sculptor and as a designer of court festivals. He was also frequently consulted as a technical adviser in the fields of architecture, fortifications, and military matters, and he served as a hydraulic and mechanical engineer. As he would throughout his life, Leonardo set boundless goals for himself; if one traces the outlines of his work for this period, or for his life as a whole, one is tempted to call it a grandiose “unfinished symphony.”

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    As a painter, Leonardo completed six works in the 17 years in Milan. (According to contemporary sources, Leonardo was commissioned to create three more pictures, but these works have since disappeared or were never done.) From about 1483 to 1486, he worked on the altar painting The Virgin of the Rocks, a project that led to 10 years of litigation between the Confraternity of the Immaculate Conception, which commissioned it, and Leonardo; for uncertain purposes, this legal dispute led Leonardo to create another version of the work in about 1508. During this first Milanese period he also made one of his most famous works, the monumental wall painting Last Supper (1495–98) in the refectory of the monastery of Santa Maria delle Grazie (for more analysis of this work, see below Last Supper). Also of note is the decorative ceiling painting (1498) he made for the Sala delle Asse in the Milan Castello Sforzesco.

    During this period Leonardo worked on a grandiose sculptural project that seems to have been the real reason he was invited to Milan: a monumental equestrian statue in bronze to be erected in honour of Francesco Sforza, the founder of the Sforza dynasty. Leonardo devoted 12 years—with interruptions—to this task. In 1493 the clay model of the horse was put on public display on the occasion of the marriage of Emperor Maximilian to Bianca Maria Sforza, and preparations were made to cast the colossal figure, which was to be 16 feet (5 metres) high. But, because of the imminent danger of war, the metal, ready to be poured, was used to make cannons instead, causing the project to come to a halt. Ludovico’s fall in 1499 sealed the fate of this abortive undertaking, which was perhaps the grandest concept of a monument in the 15th century. The ensuing war left the clay model a heap of ruins.

  3. Large numbers are numbers above one million that are usually represented either with the use of an exponent such as 10 9 or by terms such as billion or thousand millions that frequently differ from system to system. The American system of numeration for denominations above one million was modeled on a French system, but in 1948 the French ...

  4. 2 天前 · Toronto. Skyline of Toronto. The national capital is Ottawa, Canada’s fourth largest city. It lies some 250 miles (400 km) northeast of Toronto and 125 miles (200 km) west of Montreal, respectively Canada’s first and second cities in terms of population and economic, cultural, and educational importance. The third largest city is Vancouver ...

  5. 4 Oliver and Richard Cromwell served as lords protector of England, Scotland, and Ireland during the republican Commonwealth. 5 William and Mary, as husband and wife, reigned jointly until Mary's death in 1694. William then reigned alone until his own death in 1702. 6 George IV was regent from February 5, 1811.

  6. Jew. One of history’s darkest chapters, the Holocaust was the systematic killing of six million Jewish men, women, and children and millions of others by Nazi Germany and its collaborators during World War II (1939–45). Slavs, Roma, gay people, Jehovah’s Witnesses, and others also were singled out for obliteration, but the Nazis ...

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