The Portiuncula (It. Porziuncola) is a historic chapel in the town of Santa Maria degli Angeli, near Assisi, Italy. It is closely associated with Francis of Assisi and the Order of Friars Minor, who used the chapel as their headquarters. Following Francis's death in 1226, it became an important pilgrimage site. In the 16th century, a vast basilica, the Basilica of St Mary of the Angels, was built around the Portiuncula.

According to the Enchiridion Indulgentiarum, Catholic faithful may gain a plenary indulgence on 2 August (the Portiuncula) or on such other day as designated by the local ordinary for the advantage of the faithful, under the usual conditions (sacramental Confession, Holy Communion, and prayer for the intentions of the Supreme Pontiff, by devoutly visiting the parish church, and there reciting at least the Lord's Prayer and the Creed. The Indulgence applies to the cathedral church of the diocese, and to the co-cathedral church (if there is one), even if they are not parochial, and also to quasi-parochial churches. To gain this, as any plenary indulgence, the faithful must be free from any attachment to sin, even venial sin. Where this entire detachment is wanting, the indulgence is partial.

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