The transept holds works dating to the most diverse periods, bearing witness to the history of the building and the Order of the Servants of Mary. At the end of the left transept has stood since 1708 the panel of Our Lady of Mercy painted in 1436 by Giovanni di Paolo for another chapel in the church. The Virgin Mary, here celebrated as the Queen of Mercy, is wearing sumptuous robes and a crown on her head of gold lilies that recall the heraldic emblem of the Servites. Mary covers two group of faithful with her cloak; on the left are women, among whom can be identified Saint Giuliana Falconieri; on the right are the men, with Saint Philip Benizi in the forefront. The two saints, members of the Order of the Servants of Mary, are presented as exemplary figures of devotion to Our Lady. The meaning of the open cloak is an ancient tradition and refers to the legitimacy of children kept under the cloak of marriage and also to the custom that anyone who takes refuge under the sovereign’s cloak has a right to grace. This type of image is very widespread and always timely because it indicates the Blessed Mother’s mercy towards the Christian people.

In the altar under this painting are the moral remains of Blessed Gioacchino Piccolomini (1258-1305), a member of the Order of the Servants of Mary who was particularly attentive to the suffering of others and is venerated today as . . .