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WALKING TOURS OF ROME

The 'Arch of Janus'

25/8/2020

 
Map
'Arch of Janus', Rome
The 'Arch of Janus'

The monumental Arch of Janus (Arco di Giano), the only four-sided (quadrifrons) arch to have survived in Rome, dates back to the 4th century BCE. Many scholars think that the traditional attribution of the arch to Janus, the two-faced deity and god of doors and passages, is not correct.

It has been suggested that the arch was, in fact, dedicated to the emperor Constantine the Great (r. 306-37), who was deified after his death, and was known as the Arco Divi Costantini.

Each pier of the arch has two rows of three niches, and it seems reasonable to assume that some, or all, would once have housed statues, although none has been identified. 

In the Middle Ages, the Frangipane family transformed the arch into a fortress, and so it survived intact until 1830, when the attic and top part were torn down in the mistaken belief that they did not belong to the original structure.

The 'Arch of Janus', etching by Piranesi
The 'Arch of Janus', etching by Piranesi

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    Walking Tours For Discerning Travellers

    My name is David Lown and I am an art historian from Cambridge, England. Since 2001 I have lived in Italy, where I run private and
    small-group walking tours
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  • Home
  • Private Tours
  • Small-Group Tours
  • Contact
  • Rome
  • St Peter's Basilica
    • Altars >
      • Altar of St Joseph
      • Altar of St Gregory the Great
      • Altar of the Madonna of Succour
      • Altar of St Sebastian
      • Altar of the Lie
      • Altar of the Presentation of the Virgin
      • Altar of St Jerome
      • Altar of the Transfiguration
      • Altar of Pope Leo the Great
    • Monuments >
      • Countess Matilda of Canossa
      • Maria Clementina Sobieska
      • Queen Christina of Sweden
      • Pope Innocent VIII
      • Pope Paul III
      • Pope Gregory XIII
      • Pope Gregory XIV
      • Pope Leo XI
      • Pope Urban VIII
      • Pope Alexander VII
      • Pope Clement X
      • Pope Innocent XI
      • Pope Alexander VIII
      • Pope Innocent XII
      • Pope Benedict XIV
      • Pope Clement XIII
      • Pope Pius VII
      • Pope Leo XII
      • Pope Pius VIII
      • Pope Gregory XVI
      • Pope Pius X
      • Pope Benedict XV
      • Pope Pius XI
      • Pope Pius XII
      • Pope John XXIII
      • The Stuarts
    • Portico >
      • Door of Death
      • Door of Good and Evil
      • Central Door
      • Door of the Sacraments
      • Holy Door
    • Pieta
    • Chapel of the Blessed Sacrament
    • Cathedra Petri
    • Crossing >
      • Baldacchino
      • Confessio
      • Dome
      • St Longinus
      • St Helena
      • St Veronica
      • St Andrew
    • St Peter
    • Chapel of the Choir
    • Chapel of the Baptistery
    • Nave
  • Sistine Chapel
    • North Wall
    • South Wall
    • East Wall
    • Ceiling: Part One >
      • Ceiling: Part Two
      • Ceiling: Part Three
    • The Last Judgement
  • Fountains
    • Trevi Fountain
    • Fontana della Barcaccia
    • Fountain of the Triton
    • Fountain of the Bees
    • Fountain of Moses
    • Fountain of the Four Rivers
    • Fountain of the Acqua Paola
    • Fountain of the Turtles
    • Fountain of the Naiads
    • Fountain of the Cannonball
    • Piazza del Popolo
    • Fountain of the Pantheon
    • Fountains of Piazza Farnese
    • Fountain of Goddess Roma
    • Rioni Fountains
    • Street Fountains
    • Venice Marries the Sea
    • St Peter's Square
    • Fountain of the Moor
    • Fountain of Neptune
    • Fountain of the Porter
    • Fountain of the Seahorses
  • Gallery
    • Piazzas >
      • Piazza del Campidglio
      • Piazza del Quirinale
      • Piazza del Popolo
      • Piazza di Spagna
      • Piazza Navona
      • Piazza S. M. in Trastevere
      • Piazza San Pietro
    • Mosaics
    • Fountains
    • Churches
    • Ancient Rome
    • Palaces
    • Domes
    • Papal Coats of Arms
    • Street Shrines
    • Old Photographs
    • Borromini & the Baroque