Templo de San Pablo el viejo, Renaissance temple in La Merced district, Mexico City, Mexico.

Templo de San Pablo el Viejo is a closed Catholic temple in La Merced, southeast of Mexico City's historic center. The stone building, with Renaissance features, was rebuilt in the early 18th century and dedicated on January 19, 1755. Its dome collapsed in 1928, after which it was remodeled as an auditorium for Hospital Juárez.

Built between the late 1500s and early 1600s, this temple replaced an earlier chapel funded by indigenous leader Andrés de Tapia Motelchiuhtzin. Its construction marks the first phase of Christianization and institutional building following Spanish conquest.

The temple's name comes from Saint Paul the Apostle, to whom the original chapel was dedicated. The chapel was funded by Andrés de Tapia Motelchiuhtzin, governor of San Juan Tenochtitlán. Today the building is used as an auditorium for Hospital Juárez, not for worship.

The building now functions as an auditorium within Hospital Juárez, accessible through the medical facility's main entrance. Visitors should be aware this is an active medical center, so visits should be planned respectfully.

During the United States military intervention in the 1840s, this temple was briefly converted into a military hospital. The conversion reveals how historic buildings adapt to serve urgent needs during times of conflict.