Santa Susanna, Rome

Santa Susanna at the Baths of Diocletian
Santa Susanna alle Terme di Diocleziano
Baroque façade of Santa Susanna by Carlo Maderno (1603).
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41°54′15.3″N 12°29′37.1″E / 41.904250°N 12.493639°E / 41.904250; 12.493639
Location	14 Via XX Settembre, Rome
Country	Italy
Denomination	Catholic
Tradition	Roman Rite
Religious order	Cistercians (nuns)
History
Status	Titular church, parish church
Dedication	Saint Susanna
Consecrated	330
Architecture
Architect(s)	Carlo Maderno
Architectural type	Church
Style	Baroque
Groundbreaking	4th century
Completed	1603
Specifications
Length	45 metres (148 ft)
Width	17 metres (56 ft)

The Church of Saint Susanna at the Baths of Diocletian (Italian: Chiesa di Santa Susanna alle Terme di Diocleziano) is a Catholic parish and Cistercian conventual church located on the Quirinal Hill in Rome, Italy. There has been a titular church associated to its site as far back as AD 280. The current church was rebuilt between 1585 to 1603 for a community of Cistercian nuns founded on the site in 1587 and still based there.

The church served as the national parish for residents of Rome from the United States from 1921 to 2017, during which period the pastoral work of the parish was assigned to the Paulist Fathers, a society of priests founded in the United States. The Paulist Fathers' ministry to United States Catholics subsequently moved to San Patrizio (Saint Patrick).