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Pisa US English

A city in northern Italy, in Tuscany, on the Arno River; population 87,398 (2008). It is noted for the Leaning Tower of Pisa, a circular bell tower that leans about 17 feet (5 m) from the perpendicular in its height of 181 feet (55 m)

Fibonacci, Leonardo US English

(Circa 1170-circa 1250), Italian mathematician; known as Fibonacci of Pisa. He made many original contributions in complex calculations, algebra, and geometry and pioneered number theory and indeterminate analysis, discovering the Fibonacci series

Fibonacci of Pisa in Fibonacci, Leonardo US English

(Circa 1170-circa 1250), Italian mathematician; known as Fibonacci of Pisa. He made many original contributions in complex calculations, algebra, and geometry and pioneered number theory and indeterminate analysis, discovering the Fibonacci series

Leaning Tower of Pisa in Pisa US English

A city in northern Italy, in Tuscany, on the Arno River; population 87,398 (2008). It is noted for the Leaning Tower of Pisa, a circular bell tower that leans about 17 feet (5 m) from the perpendicular in its height of 181 feet (55 m)