Sant'Agostino is a

Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...

church in

Siena Siena ( , ; traditionally spelled Sienna in English; ) is a city in Tuscany, in central Italy, and the capital of the province of Siena. It is the twelfth most populated city in the region by number of inhabitants, with a population of 52,991 ...

, region of

Tuscany Tuscany ( ; ) is a Regions of Italy, region in central Italy with an area of about and a population of 3,660,834 inhabitants as of 2025. The capital city is Florence. Tuscany is known for its landscapes, history, artistic legacy, and its in ...

, Italy.

History

The construction of the church and its associated convent began in 1258 and lasted for more than fifty years. Other renovations and reconstructions were carried out in the following centuries. The church had a major fire in 1747. Luigi Vanvitelli directed the restoration works, from 1747 to 1755, where the interior was redesigned and he maintained the large altars in polychrome marble from the 16th and 17th centuries. The stucco statues in the nave and in the transept date from the Vanvitelli renovation. The portico was constructed in the early 19th century by Agostino Fantastici.

Art

The church is home to a large number of artworks, including: *''Baptism of Constantine'' by Francesco Vanni *''Trinity and Saints'' altarpiece by Pietro Sorri *Funerary monument of Agostino Chigi (1631) *''Birth of the Virgin'' and ''Nativity'' in chapel on Right by Francesco di Giorgio Martini and his workshop *''Path to the Calvary'' by Ventura Salimbeni *''The Temptation of St Anthony'' by Rutilio Manetti *Bichi Chapel **Frescoes by Luca Signorelli **Statue of

Saint Christopher Saint Christopher (, , ; ) is venerated by several Christian denominations. According to these traditions, he was a martyr killed in the reign of the 3rd-century Roman Empire, Roman emperor Decius (), or alternatively under the emperor Maximin ...

by Francesco di Giorgio **Altarpiece of ''San Cristoforo'' by Niccolo Franchini *Cappella Piccolomini **''Enthroned Madonna with child and saints'' by

Ambrogio Lorenzetti Ambrogio Lorenzetti (; – after 9 August 1348) was an Italian painter of the Sienese school. He was active from approximately 1317 to 1348. He painted ''The Allegory of Good and Bad Government'' in the Sala dei Nove (Salon of Nine or Council Ro ...

** Piccolomini altar in polychrome marble (1596), which houses an ''Adoration of the Magi'' by

Il Sodoma Il Sodoma (1477 – 14 February 1549) was the name given to the Italy, Italian Renaissance Painting, painter Giovanni Antonio Bazzi. Il Sodoma painted in a manner that superimposed the High Renaissance style of early 16th-century Rome onto the tr ...

and a ''Crucifixion'' by

Perugino Pietro Perugino ( ; ; born Pietro Vannucci or Pietro Vanucci; – 1523), an Italian Renaissance painter of the Umbrian school, developed some of the qualities that found classic expression in the High Renaissance. Raphael became his most famous ...

**Funerary monument to

Pope Pius II Pope Pius II (, ), born Enea Silvio Bartolomeo Piccolomini (; 18 October 1405 – 14 August 1464), was head of the Catholic Church and ruler of the Papal States from 19 August 1458 to his death in 1464. Aeneas Silvius was an author, diplomat, ...

(1850) The church was adjacent to the Collegio Tolomei, Siena with neoclassical portico by Agostino Fantastici.

References

{{DEFAULTSORT:Agostino Siena 14th-century Roman Catholic church buildings in Italy Agostino Gothic architecture in Siena Luigi Vanvitelli buildings Gothic church buildings in Tuscany