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Ponte Milvio
Ponte Milvio, or Pons Mulvius, is an ancient Roman bridge over the Tiber in northern Rome, site of Constantine's decisive victory over Maxentius in 312 AD.
Ponte Morandi
Ponte Morandi, also known as the Morandi Bridge or Viadotto Polcevera, was a cable-stayed highway viaduct in Genoa, Italy, opened in 1967 and designed by Riccardo Morandi.
Ponte Navea
Ponte Navea (Ponte de Navea) is a medieval single pointed-arch stone bridge over the Navea river between San Xoán de Río and A Pobra de Trives, Ourense, Galicia, built on Roman remains of the Via Nova (Via XVIII), declared Ben de Interés Cultural in 1991.
Ponte Romito
Ponte Romito, also called Ponte del Romito or ponte di Valle, is an ancient Etruscan-Roman bridge over the Arno at Laterina, Tuscany; in 2023 it was proposed as the bridge in the Mona Lisa.
Ponte Rotto
Ponte Rotto, the Broken Bridge, is the surviving single arch of the Pons Aemilius (Ponte Emilio), Rome's oldest masonry bridge, begun 179 BC and reduced to one span by the 1598 Tiber flood.
Ponte Salario
Ponte Salario, the ancient pons Anienis, is a Roman bridge on the Via Salaria over the Aniene near Rome; damaged by Totila in 544, restored by Narses in 565, destroyed in 1867 by Papal troops, rebuilt 1874, widened 1930.
Ponte Sant'Angelo
Ponte Sant'Angelo, formerly the Aelian Bridge, is a Roman bridge over the Tiber in Rome built by Emperor Hadrian about 134 AD to reach his mausoleum, the Castel Sant'Angelo.
Ponte Spiano
Ponte Spiano (Ponte Romano Spiano) is a Roman bridge just outside Sigillo, Umbria, carrying the ancient Via Flaminia over the Fonturci stream; 32 m long, 3.25 m wide, built of cornelian stone, dated to the 2nd century BC or Augustan age.
Ponte sul Fosso Tre Ponti
Ponte sul Fosso Tre Ponti (Ponte Romano sul Fosso dei Tre Ponti), Roman tuff bridge on the via Amerina between Nepi and Falerii Novi, Lazio; late 2nd century BC, single arch, best preserved Amerina bridge, reopened 2017.
Ponte Tufaro
Ponte Tufaro, also Ponte Tufaro di Montesarchio, a Roman 2nd-century BC opus quadratum bridge on the Via Appia near Benevento with three round arches, destroyed in World War II; distinct from the Ponte Romano di Tufara in Molise.
Ponte Valentino
Ponte Valentino, bridge over the Calore Irpino on the Via Appia Traiana about 4 km northeast of Benevento, Italy; Roman limestone abutments with medieval brick arches, named for a nearby church of San Valentino.
Ponte Vecchio
Ponte Vecchio, the Old Bridge of Florence over the Arno, rebuilt 1345 with three segmental arches, lined with jewellers' shops since 1593, carrying the Vasari Corridor, and the only Florentine bridge spared in the 1944 German demolitions.
Pontoon bridge
A pontoon bridge is a bridge carried on floating vessels or pontoons rather than piers, used since antiquity and still standard for military wet-gap crossings.
Pontpierre
Pontpierre: remains of a Roman bridge over the Eyrieux river at Saint-Fortunat-sur-Eyrieux, Ardèche, France; Barrington Atlas 17 D4, Pleiades 167873; also a Moselle commune and other French place names.
Pool of Siloam (בריכת השילוח)
The Pool of Siloam (בריכת השילוח), also called Siloam Pool, is an ancient water reservoir at the southern end of the City of David in Jerusalem.
Port Authority of New York and New Jersey
The Port Authority of New York and New Jersey, PANYNJ, is a bistate agency created in 1921 that runs the region's airports, bridges, tunnels, seaport, and PATH.
Port Everglades
Port Everglades (originally Lake Mabel) is a man-made deep-water seaport and inlet in Broward County, Florida, governed by Broward County as a self-funded enterprise. A top-three cruise homeport, leading container port, and South Florida's main energy seaport, with over $3 billion in planned 20-year investments.
Port of Antwerp-Bruges
Port of Antwerp-Bruges is a Belgian seaport formed in 2022 by merging the ports of Antwerp and Zeebrugge, Europe's second-largest port by cargo throughput after Rotterdam.
Port of Gdynia
The Port of Gdynia is a seaport on Gdańsk Bay in Gdynia, Poland, built from 1921 to give Poland its own harbor, becoming the largest on the Baltic within a decade.
Porta Maggiore
Porta Maggiore, also called Porta Prenestina, is a monumental double arch in Rome where the Aqua Claudia and Anio Novus aqueducts crossed two roads, built by Claudius in 52 CE.
Porta Tiburtina
Porta Tiburtina, also known as Porta San Lorenzo, is a gate in Rome's Aurelian Wall where the Via Tiburtina left the city, built around an Augustan arch of 5 BC that carried three aqueducts.
Portable water purification
Portable water purification, also known as point-of-use water treatment, is the treatment of drinking water away from a fixed supply, serving hikers, travelers, militaries, and emergency responders.
Portage Lake Lift Bridge
The Portage Lake Lift Bridge, officially the Houghton-Hancock Bridge, is a double-deck vertical-lift bridge completed in 1959 that carries US-41 and M-26 between Houghton and Hancock, Michigan.
Portal method
The portal method is an approximate hand method of structural analysis, presented by A. Smith in 1915, that determines forces in building frames under lateral loads such as wind and earthquakes.
Portal North Bridge
The Portal North Bridge is a railroad bridge under construction over the Hackensack River in New Jersey, replacing the 1910 Portal Bridge as part of the Gateway Program.
Posey and Webster Street Tubes
The Posey and Webster Street Tubes are a pair of immersed vehicular tunnels carrying State Route 260 beneath the Oakland Estuary, linking Alameda with Oakland, California.
Post-tensioned concrete bridge
A post-tensioned concrete bridge is a concrete bridge whose superstructure is prestressed by steel tendons stressed with jacks after the concrete hardens, widely used in United States bridge building.
Post-tensioning
Post-tensioning is a method of prestressing concrete in which steel tendons are tensioned with jacks after the concrete has hardened, applying a permanent compression to it.
Post-Tensioning Institute
The Post-Tensioning Institute (PTI), founded in 1976 and based in Farmington Hills, Michigan, develops codes, specifications, and certification programs for post-tensioned concrete construction and co-wrote the ACI-PTI 320-25 building code.
Potable water reuse
Potable water reuse is the use of highly treated municipal wastewater as a drinking water source, either directly or after an environmental buffer such as an aquifer.