List of Roman domes

The Pantheon in Rome. Largest dome in the world for more than 1,300 years
Oculus of the Pantheon.

This is a list of Roman domes. The Romans were the first builders in the history of architecture to realize the potential of domes for the creation of large and well-defined interior spaces.[1] Domes were introduced in a number of Roman building types such as temples, thermae, palaces, mausolea and later also churches. Half-domes also became a favoured architectural element and were adopted as apses in Christian sacred architecture.

Monumental domes began to appear in the 1st century BC in Rome and the provinces around the Mediterranean Sea. Along with vaults, they gradually replaced the traditional post and lintel construction which makes use of the column and architrave. The construction of domes was greatly facilitated by the invention of concrete, a process which has been termed the Roman Architectural Revolution.[2] Their enormous dimensions remained unsurpassed until the introduction of structural steel frames in the late 19th century (see List of the world's largest domes).[1][3][4]

Domes

All diameters are clear span in m; for polygonal domes applies the in-circle diameter. Main source is Jürgen Rasch's study of Roman domes (1985).

Diameter  Name,
Part
Location Built Shape of dome,
Ground plan
Material,
Roof construction
Shell
thickness (ST)
ST to 
Curtain wall
thickness (CWT)
CWT to 
Diameter Oculus (DO)
DO to 
Comments/
Other characteristics
~ 43.45 [5] Pantheon Rome 27-25 BC Rotunda Concrete,
Lead plate roofing
~ 1.35
1:32
~ 5.93
1:7.3
8.95
1:4.9
Largest dome of the world until 1881; largest unreinforced solid concrete dome in the world till present;[6] archetype of Western dome construction to this day[3][7]
38.20 [8] "Temple of Apollo" Lake Avernus 1st c.
~ 35.08 [4] Baths of Caracalla,
Caldarium
Rome 3rd c. Amphoras Eight pillars; largest dome of the world out of ceramic hollowware
29.50 [9] "Temple of Diana" Baiae 2nd c. 1.20
1:25
~ 5,70 [10]
1:5.2
26.30 [9] "Temple of Venus" Baiae 2nd c. - ~ 2.90 [11]
1:9.1
Outer wall pillars
25.04 [12] Mausoleum of Maxentius Rome 4th c.
25.00 [13] Baths of Agrippa,
'Arco della Ciambella'
Rome 1st c. BC Rotunda First Thermae in Rome with central dome;[13] largest dome of the world
24.15 [9] Rotunda of St. George Thessaloniki 4th c. Brick ~ 1
1:24
6.00
1:4
Largest brick dome of the world
23.85 [9] Sanctuary of Asclepius Pergamon 2nd c. Brick - 3.35
1:7.1
Earliest monumental brick dome;[14] largest brick dome of the world
~ 23.70 to
~ 19.80 [15]
St. Gereon's Basilica Cologne 4th c. Oval with eight niches and apse Later medieval structure with Roman building fabric largest occidental dome between Hagia Sophia and Florence Cathedral[16]
23.65 [9] "Temple of Minerva Medica" Rome 4th c. Decagon Concrete with brick ribs 0.56
1:42
~ 2.60 [11]
1:9.1
Outer wall pillars
~ 22.00 [17] Baths of Antoninus Carthage 2nd c. Polygon Seven domes with diameters between 17 and 22 m[17]
~ 22.00 [18] Rotunda at the Hippodrome Constantinople 5th c. Rotunda with ten niches
~ 22.00 [19] Baths of Diocletian,
San Bernardo
Rome ~ 300 Concrete with brick ribs
21.65 or
21.25 [20][21]
Baths of Diocletian,
'Planetarium'
Rome ~ 300 Umbrella dome,
Octagon
Concrete with inner brick covering 4.20
1:5.1
21.55 [21] "Temple of Mercury" Baiae 1st c. BC Concrete[22] 3.65
1:5.9
Earliest monumental dome;[23] largest dome of the world
20.18 [9] Mausoleum of Helena Rome 4th c. Ceramic amphora incorporated into dome's base 0.90
1:22
2.40
1:8.4
~ 19.80 [20] Baths of Caracalla,
Side building
Rome 3rd c. Octagon Preliminary form of the pendentive dome[20]
~ 19.40 [20] Baths of Bacucco Near Viterbo 4th c. Umbrella dome,
Octagon
19.30 [21] Baths of Diocletian,
Tepidarium
Rome ~ 300 3.68
1:5.2
18.38 [9] Pantheon Ostia 3rd c. - 1.98
1:9.3
~ 18.00 [15] Church of Euphemia Constantinople 5th c. Hexagon
16.75 [24] Hadrian's Villa,
'Serapeum'
Tivoli 2nd c. Umbrella dome Concrete Hollow space system
16.45 [17] Imperial Baths,
Tepidarium
Trier 4th c. Concrete
15.70 [17] Basilica of San Vitale Ravenna 6th c. Clay pipe,
Wooden roof construction
~ 15.60 [21] Nymphaeum in Albano Laziale ? 1st c. Concrete 2.08
1:7.6
Earliest evidence for hollow spaces at dome's base for reduction in weight[25]
~ 15.00 to
~ 13.00 [14]
Southern baths Bostra 3rd-4th c. Octagon Concrete
~ 15.00 [15] Western baths Gerasa 2nd c. Square Voussoir One of the earliest stone domes with square plan;[15] largest stone dome of the world
14.70 [9] "Heroon of Romulus" at the Roman Forum Rome 4th c. Lead plate roofing 0.90
1:16
~ 1.80
1:8.2
3,70
1:4.0
~ 14.50 [9] "Temple of Portunus" Porto ~ 3rd c. Concrete with inner brick covering - ~ 2.20
1:6.6
13.71 [9] Mausoleum of Tor de' Schiavi Via Prenestina 4th c. 0.60
1:23
2.60
1:5.3
Four openings at dome's base
13.48 [23] Domus Aurea Rome 1st c. Cloister vault,
Octagon
Concrete 5.99
1:2.3
First dome with octagonal plan; earliest in palace architecture[23]
13.35 [9] Mausoleum of Diocletian Split ~ 300 Brick,
Tiled roof
0.68
1:20
3.40 [10]
1:3.9
Double-walled dome[12]
12.90 [12] Chapel of Saint Aquilino Milan 4th c. Brick
12.33 [26] "Tempio della Tosse" Tivoli 4th c. Concrete with brick ribs 1.30
1:9
2.08
1:5.9
2.10
1:5.9
~ 12.00 [19] Hadrian's Villa,
Summer Triclinium (Exedra)
Tivoli 2nd c. Concrete with inner brick covering
~ 12.00 [17] Baths of Aquae Flavianae El Hammam 3rd c. Clay pipes Largest dome of the world out of ceramic hollowware
~ 12.00 [15] Church of Hodegetria Constantinople 5th c. Hexagon
~ 12.00 [15] Skeuophylakion Constantinople ~ 5th c. Dodecagon
11.90 [9] Baptistery Nocera Superiore
Campania
6th c. Eight rectangular dome windows
~ 11.90 [27] Hadrian's Villa,
'Heliocaminus'
Tivoli 2nd c. Double-walled dome with spacing for ceiling heating[27]
11.50 [28] "Red Basilica" Pergamon ~ 2nd c. Brick Two Rotunda; largest brick dome of the world
11.50 [26] Santa Costanza Rome 4th c. Concrete with brick ribs,
Tiled roof directly resting on dome shell
~ 0.70
1:16
1.45
1:7.9
Tambour[29]
~ 11.50 [15] Mor Gabriel Monastery Tur Abdin 6th c. Brick yes
11.47 [26] Praetorium Cologne 4th c. Octagon - 2.00 [10]
1:5.7
11.10 [26] Gordian's Villa Rome,
Via Prenestina
3rd c. Octagon - ~ 1.35 [10]
1:8.2
Preliminary form of the pendentive dome;[20] eight openings at dome's base
11.00 [4] Therme d’Allance ? ?
~ 10.80 [26] Mausoleum of Gallien Rome,
Via Appia
3rd c. Rotunda with six niches - ~ 1.60
1:6.8
10.70 [26] "Mausoleum of Centocelle" Centcelles,
near Tarragona
4th c. Brick and stone ~ 0.40
1:27
~ 1.90
1:5.6
~ 10.40 to
~ 9.40 [24]
Hadrian's Villa,
small baths
Tivoli 2nd c. Elliptical dome with wavelike rim
~ 10.00 [24] Gordian's Villa,
Hall
Via Prenestina ~ 2nd c.
~ 10.00 [25] "Villa delle Vignacce" Via Latina 2nd c. Ceramic amphora at dome's base Earliest known use of amphora at dome's base[25]
9.85 [17] Cathedral,
Baptistery
Ravenna 5th c.
~ 9.50 [20] Hadrian's Villa,
Piazza d'Oro (vestibule)
Tivoli 2nd c. Umbrella dome ~ 1,90
1:5.0
~ 9.50 [18] Praetextat catacomb,
'Calventier tomb'
Rome 3rd c. Rotunda with six niches
~ 9.00 [14] Capito Thermae,
Laconicum
Miletus 1st c. Concrete
~ 9.00 [15] Small Roundtemple Baalbek 3rd c.
~ 8.50 [18] Domus Augustana Rome 1st c. Cloister vault,
Octagon
One of the earliest cloister vaults with octagonal curtain walls[18]
8.10 [26] "Torraccio del Palombaro" Rome,
Via Appia
~ 4th c. ~ 0.90
1:9
2,30
1:3.5
~ 1.50
1:5.4
~ 7.70 [20] Baths of Maxentius Rome 4th c. Umbrella dome,
Octagon
7.60 [4] Domus Flavia Rome 1st c.
~ 7.60 to
~ 6.20 [18]
Hadrian's Villa,
'Heliocaminus'
? 2nd c. Cloister vault,
Uneven octagon
~ 6.80 [15] Nymphaeum Riza,
Epirus
~ 250-350 Dodecagon
~ 6.75 [20] "Temple of Venus",
Annex building
Baiae 2nd c. Flat umbrella dome,
Octagon
6.65 [21] Hall of Thermae Pisa ? ~ 2nd c. Cloister vault with eight windows,
Octagon
2.00
1:3.3
6.52 [23] Stabian Thermae,
Laconicum
Pompeii 1st c. BC Cone vault (early form of the dome) Concrete yes Oldest known concrete domes[23]
~ 6.00 [17] Hunting Thermae Leptis Magna ~ 200 Cloister vault with eight windows
5.86 [17] Arch of Marcus Aurelius Tripoli ? Cloister vault Voussoir
~ 5.70 [9] Water Castellum Pompeii 30 BC-
14 AD
Flat dome
5.40 [20] Octagon near 'Temple of Mercury' Baiae 2nd c. Umbrella dome,
Octagon
~ 5.40 [12] San Vitale,
Stair towers
Ravenna 6th c. Brick
5.20 [15] "Sedia del Diavolo",
Tomb
Rome,
Via Nomentana
2nd c. Square
~ 4.70 [18] Tabularium Rome 1st c. BC Cloister vault,
Square
Earliest cloister vault[15]
4.41 [24] "Temple of Venus",
Annex building
Baiae 2nd c. Umbrella dome above circular ground plan 0.59
1:7.5
~ 4.40 [30] Mausoleum of Galla Placidia Ravenna 5th c. Tiled roof
~ 4.00 [9] Tomb at Casal de' Pazzi Rome,
Via Nomentana
2nd c. In-circle dome,
Square
Concrete Preform of pendentive dome;[9] hollow space system
1.65 [23] "Villa of the Mysteries",
Laconicum
Pompeii 1st c. BC Cone vault (early form of the dome) Brick and clay (upper calotte) Concrete wall shell[31]
? [18] Mausoleum of Constantine at the Church of the Holy Apostles Constantinople 4th c. Presumably Rotunda with twelve niches

Half-domes

Diameter  Name,
Part
Location Built Shape of dome,
Ground plan
Material,
Roof construction
Shell
thickness (ST)
ST to 
Curtain wall
thickness (CWT)
CWT to 
Comments/
Other characteristics
~ 30.00 [5] Baths of Trajan Rome ? Largest dome(s) of the world
~ 22.00 [5] Baths of Diocletian,
Two apse halls
Rome ~ 300
~ 18.50 [5] Trajan's Forum Rome ?
~ 15.80 [17] Santi Cosma e Damiano,
Apse
Rome 6th c.
~ 11.00 [14] Nymphaeum Jerash 2nd c. Concrete
~ 9.60 [14] Basilica,
Apse
Bostra ~ 3rd c. Concrete, inside covered with ashlar
~ 8.00 [14] Cathedral,
Annex rooms
Bostra 6th c. Concrete
~ 5.70 [12] Pantheon,
Front niches
Rome 2nd c.

See also

References

Sources

Main source
Further sources

External links