Duke Cosimo had a plan to arrange that finest works of art in the Medici families' collections on the upper floor. This was not done until the time of Francesco I. He also commissioned Buontalenti to design the most the famous room in the Uffizi, an octagonal room called the "Tribune of the Uffizi". This room contained many of the best paintings. Rich people would often send their sons on a "Grand Tour" of Europe. The Tribune of the Uffizi was one of the important sights on the tour. At first, people could only see the gallery by "request". (They would ask politely and perhaps be shown around.) The last Medici heiress, Anna Maria Lodovica, made an agreement with the city of Florence. In 1765 the Uffizi Gallery was officially opened to the public. 