Gillian B. Elliott is Professorial Lecturer of Art History at George Washington University.

• Introduction: Sculpted Thresholds and the Liturgy of Transformation in Medieval Lombardy, 1. The Origins of the porta coeli in Milan: Saint Ambrose and the Progression of the Soul through Sacred Space, 2. Activating the Ciborium at Sant’Ambrogio in Milan: Liturgical Gestures and Neoplatonic Gifts, 3. Saint Ambrose Enthroned at the Gate: Bishop as Judge in the Atrium, 4. From Jerusalem to Civate: The Ciborium as Ark and Tomb, 5. The Saint at the Dragon Portal of San Fedele in Como, 6. San Pietro in Ciel d’Oro at Pavia: The Angel at the porta coeli, 7. Conclusion

Gillian B. Elliott is Professorial Lecturer of Art History at George Washington University.

• Introduction: Sculpted Thresholds and the Liturgy of Transformation in Medieval Lombardy, 1. The Origins of the porta coeli in Milan: Saint Ambrose and the Progression of the Soul through Sacred Space, 2. Activating the Ciborium at Sant’Ambrogio in Milan: Liturgical Gestures and Neoplatonic Gifts, 3. Saint Ambrose Enthroned at the Gate: Bishop as Judge in the Atrium, 4. From Jerusalem to Civate: The Ciborium as Ark and Tomb, 5. The Saint at the Dragon Portal of San Fedele in Como, 6. San Pietro in Ciel d’Oro at Pavia: The Angel at the porta coeli, 7. Conclusion