Honor to the vanquished
This is more or less what happened in the famous Battle of Calliano (1487), perhaps the most famous occurrence in the history of the castle.
After conquering the city of Rovereto, the army of the Republic of Venice, led by condottiero (mercenary captain) Roberto Sanseverino d’Aragona, set out to head north to take the city of Trento as well. The only strongholds that stood in the way of the plan were Castel Pietra and Castel Beseno.
Sanseverino had his men build a pontoon bridge to cross the Adige River and then attack and besiege Castel Beseno with a large and battle-hardened army. A signal was immediately sent from the castle to inform the commander of the Tyrolean troops stationed in Trento and ask for help.
The Tyroleans were inferior in number to the Venetians, but their soldiers had firearms, a novelty for the time. When they arrived on the battlefield, the din of gunfire, the smoke and the fire of the arquebuses caused panic in the Venetian army, which retreated hastily.
Many threw themselves onto the retreating pontoon bridge until it gave way, drowning hundreds of soldiers. The captain Roberto Sanseverino d’Aragona remained on the shore to fight to the death, with a handful of loyalists by his side.
The people of Trento, recognising his valour, buried his body in the Cathedral of Trento, having a large tombstone erected for him showing the leader with his face uncovered and the flag of the Republic of Venice lowered. The tombstone was made of red Trento marble, a precious material reserved only for monuments to illustrious figures.
Even today, if you visit Castel Beseno there is a room dedicated to the Battle of Calliano and to the fate of this condottiero. It reminds us of the power of this unassailable fortress, which not even the most valiant captain managed to conquer.