Summary:
- Archaeologists have discovered mysterious tunnels beneath the Palazzo Vecchio in Florence, Italy, which they believe were built by Leonardo da Vinci.
- The tunnels were likely used by da Vinci and other Renaissance-era artists and architects to move around the city unseen and access different buildings.
- The discovery provides new insights into the secretive work and movements of da Vinci and other influential figures during the Renaissance period in Florence.