The court gave an additional stimulus to his industry by employing, in competition with him, many eminent foreigners, particularly in the reign of King Charles, to embellish the palace, the villas, and the churches of royal foundation; among the latter of which the most remarkable is the church of the Sopperga, erected by Victor II., which contains the family monuments. Beaumont was in consequence brought into competition with Sebastiano Ricci, Giaquinto, Guidoboni, De Mura, Galeotti, and Gio. Batista Vanloo, the celebrated scholar of Luti. Vanloo in Turin distinguished himself both in the frescos of the villas, and in church pictures; and had with him Carlo, his brother and his scholar, who was his assistant, and executed even more works than he. He painted the beautiful decorations of a cabinet in the Palazzo, consisting of subjects from the Jerusalem of Tasso. These princes were moreover accustomed to send commissions to the most distinguished foreign painters, such as Solimene, Trevisani, Masucci, and Pittoni; which gave a stimulus to Beaumont to rival them, or at least to endeavour not to be left too far behind. And thus in his best works he sustains his fame in a commendable manner; at one time excelling in design those who conquer him in colour; at another time surpassing in spirit of execution those who excel him in design. It is the general opinion that his genius declined as he advanced in years; and this is attributed to his superintendance of the working of tapestry, for which, while he made the cartoons, he gradually degenerated into negligence of design, vulgarity in his heads, and above all, crudeness and want of harmony in his colours; a defect not uncommon in those who survived him.