The small Church of Santi Apostoli is one of the oldest in Florence. Many of the city's residents maintain that, as the inscription on the façade states, it was built as long ago as 786 by Charlemagne. However, it seems quite clear that this is not the case, the church having been built between the 10th and 11th centuries. 

Visitors will notice that the façade is Romanesque in style and features Corinthian capitals and green marble columns that belonged to the ancient Roman baths located on the Via delle Terme. 

In addition, the church features a basilica-style layout typical of early Christian churches. For their part, the lateral naves found in the interior were added in the 16th century. 

The interior houses a fifteenth century goldsmith's piece that was intended for transporting to the Duomo the sacred flame used for the Scoppio del Carro, a feast celebrated every Holy Saturday in which a cart full of firecrackers and fireworks is set on fire. This feast is held in commemoration of the resurrection of Christ. Apparently, Pazzo de'Pazzi brought three stones from Christ's tomb from Jerusalem to Florence and these were used to light the lamps that had been extinguished on Good Friday.

The Church of Santi Apostoli also overlooks the Piazza dei Limbo, where there was formerly a cemetery where children who died before being baptized were buried.