San Miguel de Allende and the nearby Sanctuary of Jesús Nazareno de Atotonilco form a paired landscape of commerce, devotion, and Mexican independence. The town originated in the sixteenth century as San Miguel el de los Chichimecas, associated with the Franciscan friar Juan de Las Casas and a frontier zone contested during the Chichimeca War. Its location on routes between central Mexican mining districts and the capital encouraged growth. Water, grazing land, workshops, and protection for travelers made the settlement an important station on the Camino Real de Tierra Adentro.

Prosperity in the seventeenth and eighteenth centuries transformed San Miguel el Grande, as it became known. Merchants, ranchers, craftspeople, clergy, Indigenous residents, Africans and their descendants, and mixed communities created a complex colonial society. Textile production and trade financed mansions, courtyards, churches, and civic buildings whose restrained street façades often concealed ornate interiors. The town's Baroque and later Neoclassical architecture reflects both local materials and the movement of ideas along imperial roads. Its irregular streets preserve the relationship between the older settlement, springs, plazas, and surrounding terrain.

About fourteen kilometers away, Father Luis Felipe Neri de Alfaro founded the Sanctuary of Atotonilco in 1740 as a place for spiritual retreat and penitential exercises. Building continued in stages into the 1770s. Alfaro shaped its program around Christ's Passion, Ignatian discipline, and imagery associated with Jerusalem's Holy Sepulchre. From the plain exterior, worshippers enter densely painted spaces. Murals attributed chiefly to the local artist Antonio Martínez de Pocasangre cover walls and vaults with biblical narratives, saints, emblems, and moral instruction in a distinctive Mexican Baroque ensemble.

Both places became embedded in the independence movement. San Miguel was home to Ignacio Allende and other conspirators who challenged Spanish rule in 1810. After Miguel Hidalgo issued the call to rebellion at Dolores on 16 September, he stopped at Atotonilco and took an image of the Virgin of Guadalupe that became the insurgents' most recognizable banner. The army then entered San Miguel. Although the rebellion endured defeats and reprisals, the town's association with Allende was later formalized when it was renamed San Miguel de Allende in 1826.

The nineteenth and twentieth centuries brought economic shifts. San Miguel declined when trade patterns changed, a circumstance that helped spare much of its historic center from intensive redevelopment. Artists and students, including foreigners drawn by postwar art schools, later contributed to a new cultural and tourism economy. At Atotonilco, continuing pilgrimages and retreats kept the sanctuary active, while smoke, moisture, salts, and heavy use threatened its paintings. Conservation campaigns beginning in the late twentieth century stabilized architecture and painstakingly cleaned murals without erasing evidence of religious practice.

UNESCO inscribed the Protective Town of San Miguel and the Sanctuary of Jesús Nazareno de Atotonilco in 2008. The designation recognizes an exchange of Spanish, Creole, and Indigenous traditions rather than a single architectural style. Today the crowded parish church skyline and quiet mural-covered sanctuary tell complementary stories: one of a prosperous, diverse town on continental trade routes, the other of an intense devotional retreat. Their shared history connects colonial frontier expansion, artistic invention, insurgent memory, living faith, and the challenges of conserving inhabited heritage.