Aeminium was the ancient name of the city of Coimbra

Coimbra

Coimbra is a city in the municipality of Coimbra in Portugal. Although it served as the nation's capital during the High Middle Ages, it is better-known for its university, the University of Coimbra, which is one of the oldest in Europe and the oldest academic institution in the...

, in Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

.

The Romans

Ancient Rome

Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....

 founded the civitas

Civitas

In the history of Rome, the Latin term civitas , according to Cicero in the time of the late Roman Republic, was the social body of the cives, or citizens, united by law . It is the law that binds them together, giving them responsibilities on the one hand and rights of citizenship on the other...

 of Aeminium in this place at the time of Augustus

Augustus

Augustus ;23 September 63 BC – 19 August AD 14) is considered the first emperor of the Roman Empire, which he ruled alone from 27 BC until his death in 14 AD.The dates of his rule are contemporary dates; Augustus lived under two calendars, the Roman Republican until 45 BC, and the Julian...

, which came under the protection of nearby Conimbriga

Conímbriga

Conímbriga is one of the largest Roman settlements in Portugal, and is classified as a National Monument. Conímbriga lies 16 km from Coimbra and less than 2 km from Condeixa-a-Nova. The site also has a museum that displays objects found by archaeologists during their excavations,...

 situated some 15 km away to the south.

The roman city was encircled by a wall, and followed an orthogonal plan, with the cardo maximus and decumanus maximus

Decumanus Maximus

In Roman city planning, a decumanus was an east-west-oriented road in a Roman city, castra , or colonia. The main decumanus was the Decumanus Maximus, which normally connected the Porta Praetoria to the Porta Decumana .This name comes from the fact that the via decumana or decimana In Roman city...

 crossing at the Forum

Forum (Roman)

A forum was a public square in a Roman municipium, or any civitas, reserved primarily for the vending of goods; i.e., a marketplace, along with the buildings used for shops and the stoas used for open stalls...

. An aqueduct

Aqueduct

An aqueduct is a water supply or navigable channel constructed to convey water. In modern engineering, the term is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose....

 existed, the remains of which were incorporated into a latter medieval renovation. Locations for the theater and amphitheater were also proposed, but still unconfirmed by archeology. A triumphal arch

Triumphal arch

A triumphal arch is a monumental structure in the shape of an archway with one or more arched passageways, often designed to span a road. In its simplest form a triumphal arch consists of two massive piers connected by an arch, crowned with a flat entablature or attic on which a statue might be...

 is documented, but was destroyed in 1778. Also a necropolis

Necropolis

A necropolis is a large cemetery or burial ground, usually including structural tombs. The word comes from the Greek νεκρόπολις - nekropolis, literally meaning "city of the dead"...

 was located to the west of the city.

The Sueves razed the nearby township of Conimbriga in 468. Its inhabitants, who had meanwhile fled to Aeminium, kept the original name of their town.

In modern Coimbra there are few remains from ancient Aeminium.
The most important is the cryptoporticus

Cryptoporticus

In Ancient Roman architecture a cryptoporticus is a covered corridor or passageway. The usual English is "cryptoportico". The cryptoportico is a semi-subterranean gallery whose vaulting supports portico structures aboveground and which is lit from openings at the tops of its arches...

, an underground gallery of arched corridors built to support the Forum of the city, dating from the I to II century AD. Gaius Sevius Lupus was probably the architect. During the Middle Ages, the Bishop's palace in the city was built over the forum, and the cryptoporticus is now located under it, now turned into the Machado de Castro Museum. The cryptoporticus can be visited through the museum.