Column of Phocas

The Lapis Niger (Latin, "Black Stone") is an ancient shrine in the Roman Forum. Together with the associated Vulcanal (a sanctuary to Vulcan) it constitutes the only surviving remnants of the old Comitium, an early assembly area that preceded the Forum and is thought to derive from an archaic cult site of the 7th or 8th century BC. The black marble paving (1st century BC) and modern concrete enclosure (early 20th century) of the Lapis Niger overlie an ancient altar and a stone block with one of the earliest known Old Latin inscriptions (c. 570–550 BC). The superstructure monument and shrine may have been built by Julius Caesar during his reorganization of the Forum and Comitium space. Alternatively, this may have been done a generation earlier by Sulla during one of his construction projects around the Curia Hostilia. The site was rediscovered and excavated from 1899 to 1905 by Italian archaeologist Giacomo Boni. Mentioned in many ancient descriptions of the Forum dating back to the Roman Republic and the early days of the Roman Empire, the significance of the Lapis Niger shrine was obscure and mysterious to later Romans, but it was always discussed as a place of great sacredness and significance. It is constructed on top of a sacred spot consisting of much older artifacts found about 5 ft (1.5 m) below the present ground level. The name "black stone" may have originally referred to the black stone block (one of the earliest known Latin inscriptions) or it may refer to the later black marble paving at the surface. Located in the Comitium in front of the Curia Julia, this structure survived for centuries due to a combination of reverential treatment and overbuilding during the era of the early Roman Empire.

The Plutei of Trajan (Latin Plutei Traiani; often called the Anaglypha Traiani) are carved stone balustrades built for the Roman emperor Trajan. They are on display inside the Curia Julia in the Forum Romanum today, but are not part of the original structure. It is unknown exactly where Trajan erected them. They are believed to have been built either on the edge of the Rostra or on the sides of the black pavement marking the underground "Tomb of Romulus". In spite of this uncertainty, they are of great historical value because the carvings show the full length of both sides of the Forum at the time they were erected.

The rostra (Italian: Rostri) was a large platform built in the city of Rome that stood during the republican and imperial periods. Speakers would stand on the rostra and face the north side of the comitium towards the senate house and deliver orations to those assembled in between. It is often referred to as a suggestus or tribunal, the first form of which dates back to the Roman Kingdom, the Vulcanal.It derives its name from the six rostra (plural of rostrum, a warship's ram) which were captured following the victory which ended the Latin War in the Battle of Antium in 338 BC and mounted to its side. Originally, the term meant a single structure located within the Comitium space near the Forum and usually associated with the Senate Curia. It began to be referred to as the Rostra Vetera ("Elder Rostra") in the imperial age to distinguish it from other later platforms designed for similar purposes which took the name "Rostra" along with its builder's name or the person it honored.

The Five-Columns monument is a dedicatory addition to the Rostra in the Roman Forum dating to the early fourth century CE. This monument was part of the Tetrarchy’s expansion of the Forum and is connected to the tenth anniversary of the Caesares within the four-ruler system. It is also referred to as the Fünfsäulendenkmal as well as the four-column monument, depending on Jupiter’s inclusion.

The Arch of Septimius Severus (Italian: Arco di Settimio Severo) at the northeastern end of the Roman Forum is a white marble triumphal arch dedicated in 203 A.D. to commemorate the Parthian victories of Emperor Septimius Severus and his two sons, Caracalla and Geta, in the two campaigns against the Parthians of 194-195 A.D. and 197–199 A.D. After the death of Septimius Severus, his sons Caracalla and Geta were initially joint emperors. Caracalla had Geta assassinated in 212 A.D.; Geta's memorials were destroyed and all images or mentions of him were removed from public buildings and monuments. Accordingly, Geta's image and inscriptions referring to him were removed from the arch.

The Umbilicus Urbis Romae (Classical Latin: [ʊmbɪˈliːkʊs ˈʊrbɪs ˈroːmae̯])—"Navel of the City of Rome"—was the symbolic centre of the city from which, and to which, all distances in Ancient Rome were measured. It was situated in the Roman Forum where its remnants can still be seen. These remains are located beside the Arch of Septimius Severus and the Vulcanal, behind the Rostra. Originally covered in marble, the Umbilicus is now a forlorn-looking brick core some 2 metres high and 4.45 metres in diameter.

The Shrine of Vulcan (Italian: Volcanale), or Vulcanal, or Volcanal, was an 8th-century BC sacred precinct on the future site of the Roman Forum in Rome, modern Italy. Dedicated to Vulcan, the Roman god of fire, it was traditionally considered to commemorate the spot where the legendary figures Romulus and Tatius concluded the peace treaty between the tribes known as the Latins — on the Palatine Hill — and the Sabines — on the Quirinal and Esquiline. This famous merger of the hill-villages was said to be the foundation of the Roman state.

Santi Sergio e Bacco al Foro Romano (Italian: Saints Sergius and Bacchus at the Roman Forum) also called Santi Sergio e Bacco sub Capitolio (Saints Sergius and Bacchus under the Capitoline) was an ancient titular church in Rome, now lost. Located in the ruins of the Roman Forum, it had been one of the ancient diaconiae of the city and a collect church for one of the station days of Lent, but it was demolished in the sixteenth century.

The altar of Saturn (Latin: Ara Saturni) is an archaic altar dedicated to the god Saturn. Constructed in the sixth century BCE, it continued to be used until the Roman Empire collapsed. It is located in front of the Temple of Saturn in the Roman Forum and its remains were uncovered by Rodolfo Lanciani in 1902.

The Lacus Curtius ("Lake Curtius") was a mysterious pit or pool in the ground in the Forum Romanum. The area where the Forum would later be built was originally likely a lake, as the area it was in is known to have been surrounded by brooks and marshes. One part of the area was never drained, but gradually became smaller until only a basin, known as the Lacus Curtius, was left. Its nature and significance in Rome's early history is uncertain, and several conflicting stories exist about its history. The name of the place is likely connected with the Curtia gens, a very old Roman Family with Sabine origins.

The Graecostasis was a platform in the Comitium near the Roman Forum, located to the west of the Rostra. The name refers to the Greek ambassadors for whom the platform was originally built after the Roman Republic conquered Greece. Placed at the southwest end of the Comitium, the platform was the designated spot for all representatives of foreign nations and dignitaries from the republic and empire's domain. Visiting outsiders were not permitted within the Senate House or Curia and instead may have stood on this platform while waiting to meet with senators or to hear orations from the Rostra to its east side. Although one scholar has disputed this interpretation and argues that it may have served as a viewing platform for entertainment.

The Comitium (Italian: Comizio) was the original open-air public meeting space of Ancient Rome, and had major religious and prophetic significance. The name comes from the Latin word for "assembly". The Comitium location at the northwest corner of the Roman Forum was later lost in the city's growth and development, but was rediscovered and excavated by archaeologists at the turn of the twentieth century. Some of Rome's earliest monuments; including the speaking platform known as the Rostra, the Columna Maenia, the Graecostasis and the Tabula Valeria were part of or associated with the Comitium. The Comitium was the location for much of the political and judicial activity of Rome. It was the meeting place of the Curiate Assembly, the earliest Popular assembly of organised voting divisions of the Republic. Later, during the Roman Republic, the Tribal Assembly and Plebeian Assembly met there. The Comitium was in front of the meeting house of the Roman Senate – the still-existing Curia Julia and its predecessor, the Curia Hostilia. The Curia Julia is associated with the Comitium by both Livy and Cicero.Most Roman cities had a similar comitium for public meetings (L. contiones) or assemblies for election], councils and tribunals. As part of the forum, where temples, commerce, judicial, and city buildings were located, the comitium was the center of political activity. Romans tended to organize their needs into specific locations within the city. As the city grew, the larger Comitia Centuriata met on the Campus Martius, outside the city walls. The comitium remained of importance for formal elections of some magistrates; however, as their importance decayed after the end of the republic, so did the importance of the comitium.