Technology & Infrastructure in the 2nd century

35 sourced entries, 100 CE to 197 CE, oldest first. Also see Technology & Infrastructure across every century or everything else in the 2nd century.

• 100Bricks become the primary building material in the Roman Empire.source
• 100Main hall, Trajan's Market, Rome, is made (until AD 112).source
• 101Trajan begins his fourth consulship.source
• 102Planning and surveying for the port of Ostia is undertaken.source
• 104Apollodorus of Damascus builds a stone bridge over the Danube more than 1,000 m ft long, almost 20 m ft high and 15 m ft wide. The bridge connects what is now Serbia with Romania (at the time known as Dacia).source
• 104Trajan gives the order to have the Alcántara Bridge, constructed by the architect Lacer, built over the Tagus River at Alcántara (Hispania).source
• 105The Trajan Bridge is finished. For more than a thousand years, it is the longest arch bridge in the world to have been built, in terms of both total and span length.source
• 108The Hypogeum of Yarhai, an underground tomb from the Syrian city of Palmyra dedicated to the family of Yarhai, is built.source
• 109The Baths of Trajan, built by the architect Apollodorus of Damascus, are dedicated during the Calends. The thermae are constructed on the platform of the Palace of Nero (Domus Aurea) in Rome.source
• 110The Forum of Trajan is constructed in Rome, by the Syrian architect Apollodorus of Damascus.source
• 114Construction begins on the Arch of Trajan in Benevento.source
• 117Construction begins on the Pantheon in Rome.source
• 118Pantheon, in Rome, starts to be built (approximate date).source
• 120Foss Dyke is constructed in Britain.source
• 120The Market Gate of Miletus is built at Miletos (moved in modern times to Staatliche Museen zu Berlin, Preußischer Kulturbesitz, Antikensammlung).source
• 121Construction of the Temple of Venus and Roma begins in Rome.source
• 122September 13 – The building of Hadrian's Wall begins.source
• 123Housesteads Fort is constructed on Hadrian's Wall north of Bardon Mill.source
• 123Hadrian's Villa at Tivoli is built.source
• 124Emperor Hadrian begins to rebuild the Olympeion in Athens.source
• 125Hadrian's Villa, Tivoli, Italy, starts to be built (approximate date).source
• 125Zhang Heng of Han dynasty China invents a hydraulic-powered armillary sphere.source
• 125The Pantheon is constructed in Rome, as it stands today.source
• 130A Triumphal Arch for Hadrian is built in Gerasa.source
• 130Construction begins on Canopus, Hadrian's Villa, Tivoli, Italy.source
• 131Emperor Hadrian builds the city Aelia Capitolina, on the location of Jerusalem.source
• 132Construction begins on the Mausoleum of Hadrian in Rome (known today as Castel Sant'Angelo).source
• 138Construction begins on the Theater of Philadelphia (Amman).source
• 150The Great Pyramid of the Sun is constructed in Teotihuacan. It is the tallest pre-Columbian building in the Americas.source
• 158The earliest dated use of Sol Invictus, in a dedication from Rome.source
• 160In Rome, the manufacturing of soap containing grease, lime and ashes begins.source
• 170The Porta Nigra is built in Augusta Treverorum (modern Trier). (approximate date)source
• 179The Roman fort Castra Regina ("fortress by the Regen river") is built at Regensburg, on the right bank of the Danube in Germany.source
• 180Work begins in Rome on the building of the Column of Marcus Aurelius.source
• 197Septimius Severus forms new naval units, manning all the triremes in Italy with heavily armed troops for war in the East. His soldiers embark on an artificial canal between the Tigris and Euphrates.source