Nuestra Señora de Guadalupe Church, Plaza de San Juan, Catholic church in Plaza de San Juan, Mexico City, Mexico.

Nuestra Señora de Guadalupe Church, known as the Buen Tono church, is an early 20th-century temple in the San Juan neighborhood of Mexico City's historic center. It has an eclectic, French-inspired style, with lanterns and stained glass brought from France. Its tubular organ was built in the United Kingdom by J. W. Walker & Sons Ltd.

The Clarissas arrived in 1598 at the convent of San Juan de la Penitencia, founded after a 1591 agreement between the neighborhood and Viceroy Luis de Velasco II. After the Reform Laws, the convent was vacated in 1867 and demolished around 1890, when Ernesto Pugibet bought the land for his El Buen Tono cigarette factory. At the start of the 20th century Pugibet had the old temple demolished and commissioned engineer Miguel Ángel de Quevedo to build the present church, consecrated on 29 January 1912.

This church is dedicated to the Virgin of Guadalupe and serves as a place where locals gather for religious ceremonies and family celebrations. The name itself reflects the deep connection many Mexican Catholics feel toward this revered figure.

The church stands on the east side of the Plaza de San Juan in the Centro Histórico, a short walk from the San Juan de Letrán metro area. It remains an active parish, so visits are best timed outside Mass, especially on 12 December, the feast day, when the neighbourhood fills for the celebration.

The building maintains a rare connection to a major cigarette factory called El Buen Tono that once operated nearby. This makes it an unusual example of how religious and industrial interests came together in this part of the city.