Tbilisi holds 1.16 million residents within its municipal boundaries as of the 2024 census, representing approximately 31 percent of Georgia's total population. The city extends across 726 square kilometers along both banks of the Mtkvari River at elevations ranging from 380 to 770 meters above sea level, where the Trialeti Range meets the eastern foothills of the Likhi Range. January temperatures average 2.3 degrees Celsius while July reaches 24.9 degrees, with annual precipitation of 495 millimeters concentrated in May and June. The Mtkvari bisects the city from northwest to southeast for 21 kilometers of its urban course, creating distinct left-bank and right-bank neighborhoods that functioned as separate administrative zones until the Soviet consolidation of 1936.
The name Tbilisi derives from the Georgian word "tbili" meaning warm, a reference to the sulfur springs that emerge at temperatures between 37 and 47 degrees Celsius in the Abanotubani district. Archaeological excavations at the Narikala fortress site document continuous settlement from the fourth century CE, though the traditional founding date of 458 CE marks when King Vakhtang I Gorgasali designated Tbilisi as capital of the Kingdom of Iberia, replacing Mtskheta 20 kilometers to the north. The city's position at the crossroads between the Black Sea and Caspian Sea placed it on the major trade route connecting Constantinople to the Silk Road networks, making it a contested prize among Persian, Byzantine, Arab, Mongol, and Ottoman forces across fourteen centuries. Persian control from 1616 to 1762 left architectural and administrative legacies that persist in the Old Town street layout and bathhouse construction methods.
The Old Town occupies approximately 1.2 square kilometers between the Mtkvari's right bank and the slopes ascending to Narikala Fortress. Shardeni Street, Erekle II Street, and Leselidze Street form the primary pedestrian corridors through neighborhoods where structures from the seventeenth through nineteenth centuries stand in varying states of restoration. The traditional Tbilisi house design features carved wooden balconies overhanging narrow streets, brick or stone ground floors supporting timber upper stories, and interior courtyards accessed through covered passages. Approximately 2,100 buildings in the Old Town carry heritage protection status under the 2007 Law on Cultural Heritage, though enforcement has proven inconsistent as evidenced by the demolition of 23 protected structures between 2012 and 2019 according to Georgian National Agency for Cultural Heritage Preservation records.
Narikala Fortress sits on the Sololaki Ridge at 520 meters elevation, dominating the Old Town from its southern boundary. The lower fortress walls date to the fourth century under Persian-Iberian construction, while the upper citadel received its current configuration during the ninth-century Arab Emirate period. Mongol forces expanded the northern bastions in 1240, and Ottoman renovations between 1627 and 1723 added the characteristic red brick sections visible from the city below. An 1827 ammunition depot explosion destroyed approximately 40 percent of the fortress interior, leaving only peripheral walls and the St. Nicholas Church ruins that stood until Soviet demolition in 1827. The cable car installed in 2012 ascends 120 vertical meters from Rike Park to the fortress level, covering 500 horizontal meters in 90 seconds at a capacity of 1,000 passengers per hour.
Rustaveli Avenue extends 1.5 kilometers from Freedom Square to Kostava Street as Tbilisi's primary administrative and cultural corridor. The avenue achieved its current form between 1851 and 1883 during the Russian Imperial administration, when Governor-General Mikhail Vorontsov commissioned the demolition of medieval walls and the construction of European-style boulevards. The Georgian Parliament building at Number 8 Rustaveli Avenue occupies the former Transcaucasian Sejm structure completed in 1938, notable for its Stalinist neoclassical facade featuring six Corinthian columns and a triangular pediment. Directly opposite at Number 1 stands the Rustaveli Theatre, opened in 1887 with a Moorish Revival exterior designed by Alexander Shimkevich that survived both the 1920 Soviet invasion and the 1991-1992 civil conflict. The avenue sustained significant damage during the December 1991 street fighting, when 113 buildings received artillery impacts concentrated in the blocks between Freedom Square and Kashueti Street.
The Holy Trinity Cathedral, known as Sameba, rises 84 meters above Avlabari district on Elia Hill's northeastern slope, making it the tallest Orthodox church structure in the South Caucasus. Construction spanned 1995 to 2004 under architect Archil Mindiashvili's direction, employing traditional Georgian ecclesiastical forms scaled to monumental proportions with a central dome diameter of 31 meters. The complex covers 5,000 square meters across nine chapels arranged on three levels, with the lower church extending 13 meters below grade into the hillside. The cathedral's consecration on November 23, 2004 marked the 1,500th anniversary of Georgian autocephaly within Orthodox Christianity, though the exact date of autocephaly recognition remains disputed among church historians who cite dates ranging from 467 to 487 CE.
Abanotubani occupies the valley floor at the Old Town's eastern terminus where sulfur springs have supported bathhouse operations for at least 800 years. The current bathhouse structures date from the seventeenth through nineteenth centuries, built in Persian architectural style with brick domes and tiled interiors over spring channels directing 650 liters per minute at temperatures between 37 and 40 degrees Celsius. The Orbeliani Bathhouse, completed in 1840, features exterior tile work in turquoise and cobalt depicting geometric and floral patterns characteristic of Qajar-era Iranian ceramic arts. The Royal Baths, operating since 1753 according to property records held by the Tbilisi City Archive, maintain five private bathing rooms and one 30-square-meter common hall where Stalin, Beria, and various Bolshevik leadership figures reportedly met in December 1905 to plan strikes in the Baku oil fields.
Freedom Square marks the junction between Rustaveli Avenue and the Old Town, occupying what functioned as the city's main bazaar location until 1865. The square received seven different official names between 1918 and 1991: Paskevich-Erivansky Square under Russian Imperial rule, Liberty Square during the 1918-1921 Democratic Republic period, Beria Square from 1938 to 1953, Lenin Square from 1956 to 1991, and finally Freedom Square following independence restoration in April 1991. The Freedom Monument installed in 2006 stands 35 meters tall with a 5.6-meter gilded statue of Saint George atop a white marble column, replacing the Lenin statue removed during the August 1991 coup attempt. The square functions as Tbilisi's primary metro interchange where the Akhmeteli-Varketili and Saburtalo lines intersect, serving 54,000 daily passengers through the station opened in 1966.
Mtatsminda rises 770 meters above sea level as Tbilisi's highest point, accessible by funicular railway since 1905. The funicular ascends 501 vertical meters across a 1,190-meter track length in two sections with a midpoint transfer station at Pantheon level, where the Mtatsminda Pantheon contains graves of Alexander Griboyedov, Ilia Chavchavadze, Akaki Tsereteli, and 47 other Georgian cultural figures. The upper terminus at 740 meters elevation hosts an amusement park operating since 1934, rebuilt in 2014 with a 62-meter Ferris wheel visible across Tbilisi's eastern districts. The Mtatsminda Television Tower, completed in 1972, reaches 274.5 meters but has remained closed to public access since 1995 following structural assessments that identified foundation instability requiring remediation work estimated at 18 million lari as of 2019 budget proposals.