Florence Baptistery
The Florence Baptistery stands in the Piazza del Duomo, yet its true age has remained a mystery for centuries. For most of its history, locals believed it was an ancient Roman temple dedicated to Mars. Modern excavations have disproven this theory, revealing instead that a large house occupied the site during Roman times and a burial ground with rough-hewn stones dates from around the 7th century beneath the current structure. No documents regarding the building's construction survive, making scholarly dating entirely dependent on masonry techniques and architectural style.
Current consensus places the origins in the 11th or 12th century, though specific dates were long obscured by conflicting historical claims. A 1684 book by Ferdinando Leopoldo Del Migliore suggested Pope Nicholas II consecrated the building in 1059 while another claimed a baptismal font arrived in 1128. Recent archival research has shown both dates to be inaccurate fabrications. Instead, evidence points to a major project beginning in the early 1070s, likely under the supervision of Bishop Ranieri who took office in 1072 or 1073.
A hypothesis published in 2024 suggests powerful rulers Beatrice of Lorraine and her daughter Matilda of Tuscany sponsored the work alongside Pope Gregory VII. Florence at the time was too small to afford such an ambitious project alone. The political climate supports this timeline; reformist Vallombrosian monks had accused Bishop Pietro Mezzabarba of simony in the 1060s, causing a crisis where citizens refused his chrism for baptisms until he left in 1068. A new monumental baptistery would restore episcopal authority and ensure communal baptisms on Holy Saturday as canon law required.
The octagonal plan of the Baptistery draws inspiration from the ancient Roman Pantheon but achieves a unique effect that scholars say has no parallel. Walter Paatz observed that the total impact of the building is singular, creating an enigma regarding its origins that persists today. The eight sides are ornamented with classical architectural elements over marble incrustation marked by two-color geometric patterns using white Carrara marble and green-black serpentinite from Prato.
The shape holds deep theological significance beyond mere aesthetics. Timothy Verdon explains that while earthly life unfolds in units of finite time like the seven days of the week, Baptism allows believers to pass into eternal life beyond measurable time. They enter what theologians call the eighth day. This concept aligns with early Christian examples like the fourth-century Battistero Paleocristiano beneath Milan Cathedral and the fifth-century Lateran Baptistery.
Construction continued well into the 12th century even if the building was in use by the late 1080s. Giovanni Villani records that the lantern atop the dome was completed in 1150, marking the first known example of this element in architectural history. Thick walls beneath the floor form an inner octagon whose purpose remains obscure, though scholars suggest they may have enclosed a full-immersion basin or held up a ring of columns similar to structures found at Pisa.
In the 1320s the powerful Arte di Calimala guild commissioned Andrea Pisano to create bronze reliefs for the south portal through which parents bearing infants entered for baptism. The project took six years to complete, with the year 1330 appearing above the doors. Pisano made wax models executed by Venetian masters before gilding them. The historian Giovanni Villani oversaw the work and later recalled it proudly as a visual epic retelling twenty scenes from the life of John the Baptist.
A competition in 1401 changed the trajectory of Florentine art when seven sculptors were asked to submit relief panels depicting the Sacrifice of Isaac. Lorenzo Ghiberti won the commission alongside Filippo Brunelleschi, though historical accounts differ on whether judges declared him the sole winner or if they remained deadlocked between the two rivals. Ghiberti received the contract in November 1403 and led a workshop that included Donatello, Michelozzo, Paolo Uccello, and Masolino until installation on Easter Sunday 1424.
The second set of doors known as the Gates of Paradise required even more resources. Work lasted from 1429 until 1447 and cost almost as much as Florence's purchase of Sansepolcro. Ghiberti's salary equaled that of a Medici bank manager. He created ten large panels without quatrefoils allowing multiple episodes per panel. Every panel was gilded entirely giving greater unity than earlier doors where ground bronze remained bare. Copies made between 1990 and 2009 now hang at the original site while the masterpieces reside in the Museo dell'Opera del Duomo.
A magnificent mosaic ceiling crowns the interior space using an Italo-Byzantine style generally completed between 1240 and 1300 despite political interruptions. The project involved around ten million mosaic tesserae with a famous inscription suggesting work began in 1225 though this date must be later since it references Saint Francis not canonized until 1228. An anonymous master designed the six-meter-high Christ Sitting in Judgment while other sections reflect the work of Meliore di Jacopo and Coppo di Marcovaldo who fought in the Battle of Montaperti in 1260.
Hell occupies the left side of the Last Judgment zone featuring a desolate landscape of rocky mountains spewing fire. Miklós Boskovits describes how small devils transport damned souls inflicting varied tortures including culinary aspects where a man impaled on a spit is turned by a devil stoking flames below. Another demon bastes him with oil while a third seizes a reprobate to amputate his arm with a meat-cleaver. Judas appears hanged on a tree to the far right identified by a caption.
Cimabue possibly participated in designing episodes like the Fall of Man and the Rebuke of the Creator during the mid-1270s though scholars debate his direct involvement. Corso di Buono succeeded Cimabue completing the northeast and eastern segments while Grifo di Tancredi worked alongside him. The remainder of scenes attributed to anonymous artists known as the Penultimate Master and the Last Master feature soft modeling and elaborate architectural settings dating around 1300.
The interior features an altar reconstructed in 1911 by Giuseppe Castellucci using pieces preserved by Antonio Francesco Gori after the original 12th-century structure was dismantled in 1731. This design inspired Brunelleschi's altar for the Old Sacristy of San Lorenzo. From at least the 13th century a silver panel covered the front of the altar until the Arte di Calimala melted it down in 1366 to start a more sumptuous work now displayed in the Museo dell'Opera del Duomo.
Sculptors from Orcagna's circle carved the present octagonal baptismal font inscribed with the year 1370 standing near the south entrance. In the mid-15th century the decision transformed the frontal into a mobile altar set up three times annually on the ancient font along with liturgical objects and reliquaries. Matteo di Giovanni and Tommaso Ghiberti worked on the central niche while Michelozzo cast John the Baptist. Bernardo Cennini and Antonio del Pollaiuolo added scenes later creating an ensemble spanning over a century considered the noblest emblem of the city.
Just right of the chancel lies the tomb of Bishop Ranieri stylistically similar to Countesses Cilla and Gasdia in Badia a Settimo from around 1096. Nearby stands the monumental tomb of Antipope John XXIII by Donatello and Michelozzo featuring a gilt statue reposing on a deathbed supported by two lions under a canopy of gilt drapery. This monument was a first in Renaissance history as the antipope bequeathed great wealth and relics to the Baptistery.
Florentine infants were originally baptized in large groups on Holy Saturday and Pentecost using a five-basin font located at the center of the building. Over the course of the 13th century individual baptisms soon after birth became common reducing the need for such apparatus. Around 1370 a small font commissioned remains in use today while the original font disused was dismantled in 1577 by Francesco I de' Medici to make room for grand-ducal celebrations an act deplored by Florentines at the time.
The building serves as a focus for the city's most important religious celebrations including the Festival of Saint John held on June 24 which remains a legal holiday in Florence. In the past it housed the insignia of Florence and towns it conquered offering a venue to honor individual achievement like victory in festival horse races. Dante Alighieri was baptized there and hoped vainly that he would return as poet to put on laurel crowns at his baptismal font according to Paradiso Canto XXV lines 8-9.
City walls begun in 1285 may have been designed so the Baptistery sat at the exact center of Florence mimicking Ezekiel's temple at the center of the New Jerusalem. Even in the 19th century the southern portal remained flanked by sarcophagi reminding visitors of earthly death while underscoring the message of eternal life offered by baptism.
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Common questions
When was the Florence Baptistery built?
Evidence points to a major project beginning in the early 1070s, likely under the supervision of Bishop Ranieri who took office in 1072 or 1073. Construction continued well into the 12th century even if the building was in use by the late 1080s.
Who sponsored the construction of the Florence Baptistery?
A hypothesis published in 2024 suggests powerful rulers Beatrice of Lorraine and her daughter Matilda of Tuscany sponsored the work alongside Pope Gregory VII. Florence at the time was too small to afford such an ambitious project alone.
What is the significance of the eight sides of the Florence Baptistery?
The shape holds deep theological significance beyond mere aesthetics as theologians call the eighth day eternal life beyond measurable time. This concept aligns with early Christian examples like the fourth-century Battistero Paleocristiano beneath Milan Cathedral and the fifth-century Lateran Baptistery.
How much did the Gates of Paradise cost for the Florence Baptistery?
Work lasted from 1429 until 1447 and cost almost as much as Florence's purchase of Sansepolcro. Ghiberti's salary equaled that of a Medici bank manager during this period.
When were the bronze doors of the Florence Baptistery completed?
Giovanni Villani records that the lantern atop the dome was completed in 1150, marking the first known example of this element in architectural history. The south portal reliefs by Andrea Pisano took six years to complete, with the year 1330 appearing above the doors.