When he completed his magnificent altar piece of the Virgin in Majesty, the Maesta, the powers that be declared a public holiday
The painting was installed in the cathedral of Siena on 9 June 1311. One person who witnessed this event wrote:
And on that day when it was brought into the cathedral, all workshops remained closed, and the bishop commanded a great host of devoted priests and monks to file past in solemn procession. This was accompanied by all the high officers of the Commune and by all the people; all honorable citizens of Siena surrounded said panel with candles held in their hands, and women and children followed humbly behind. They accompanied the panel amidst the glorious pealing of bells after a solemn procession on the Piazza del Campo into the very cathedral; and all this out of reverence for the costly panel… The poor received many alms, and we prayed to the Holy Mother of God, our patron saint, that she might in her infinite mercy preserve this our city of Siena from every misfortune, traitor or enemy.
Here are some of the panels