how many structures did michelangelo build
The artist’s early sculptures emerged triumphant on the European stage before he reached the age of twenty-five. In his late thirties, and under pressure, he completed the most masterful and visionary example of fresco painting ever known: the ceiling of the Sistine Chapel.
In his drive to be known as a great sculptor, Michelangelo often declared that he was neither a painter nor an architect. In fact, he was both.
Primarily a sculptor as well as a skilled painter, Michelangelo in addition took on the rigours and challenges of architecture. This started in 1514 when he was asked to design the facade of the Basilica San Lorenzo in Florence, but he continued to work professionally on architectural projects until his death in 1564.
Michelangelo’s output was both outstanding and prolific, defying the mores of the day and ultimately challenging others (including Bernini and Borromini) to move away from the Renaissance and Mannerism towards Baroque.
Michelangelo’s first important architectural project was the fagade of the church of San Lorenzo, a commission from Pope Leo X de’ Medici, who wanted to honor his family. In a project design competition, the Pope and Cardinal Julius de’ Medici chose Michelangelo’s design over those presented by the most prominent artists of the time. Baccio d’Angelo, Michelangelo’s assistant on this project, build a model based on this design. It was rejected. A new model built by Michelangelo and Pietro Urbano won the Pope’s approval two years later; unfortunately, the work was interrupted and was never completed.
These fortifications change from top to bottom the data for these specific constructions as we restore the plans preserved at the Casa Buonarroti. For the first time, the builder thinks as much about defense as offense, from the interior towards the exterior, achieved by spaces with a clear view, placed between the bastions in the form of pliers or claws which enclose the uncovered areas. As de Tolnay noted, the plans for the fortifications would have a decided influence on one of the greatest architects of strategic construction, Vauban.
Once completed, the depiction of Christ and the Virgin Mary naked was considered sacrilegious, and Cardinal Carafa and Monsignor Sernini (Mantua’s ambassador) campaigned to have the fresco removed or censored, but the Pope resisted. At the Council of Trent, shortly before Michelangelo’s death in 1564, it was decided to obscure the genitals and Daniele da Volterra, an apprentice of Michelangelo, was commissioned to make the alterations.  An uncensored copy of the original, by Marcello Venusti, is in the Capodimonte Museum of Naples. 
Also during this period, Michelangelo was commissioned by Angelo Doni to paint a “Holy Family” as a present for his wife, Maddalena Strozzi. It is known as the Doni Tondo and hangs in the Uffizi Gallery in its original magnificent frame, which Michelangelo may have designed.   He also may have painted the Madonna and Child with John the Baptist, known as the Manchester Madonna and now in the National Gallery, London. 
It was gifted to his nephew Lionardo Buonarroti in his will. It was later converted to a museum dedicated to Michelangelo by his great-nephew some years later.
Of his most notable architectural works were his contributions to the St. Peter’s Basilica in Rome. Although not the original architect, he took over after the death of his predecessors.