The artist worked on several impressive architectural plans in Italy, some of which were to then be used in the later construction, whilst others never got beyond the planning stages.
The architectural drawings required an artist to be experienced in his craft and as such most of these commissions came towards the end of the artist's career, when his reputation and technical knowledge was at it's highest.
Michelangelo was someone who wanted to stamp his own personal touches on each and every project in which he was involved, as his architectural sketches and plans were no different in this regard.
On certain projects Michelangelo would take existing designs from other architects and as his own ideas to push them up in terms of originality and technical qualities.
One of Michelangelo's key architectural projects was St Peter's Basilica, for which the artist made some key contributions on alongside other famous names of that time.