Aldera was the capitalcity of Alderaan. It was located in the mountains of the planet, nestled on an island at the center of a lake. When the Galactic Empire was officially established, the city was already seven centuries old. In addition to being the planet's seat of power, Aldera was also an important center of culture and science, comprising the University of Alderaan, several musea and the famous cooking school of the Epicurium. However, it was destroyed in 0 BBY along with the rest of Alderaan, when the Empire saw an opportunity to break in its new superweapon, the firstDeath Star.
The city of Aldera was built on an island[1] with uneven slopes located in the middle of a lake. That lake was in fact a relatively recent—from a geological point of view—meteor crater which had broken through into the underground aquifers[3] around 30,500 BBY.[8] The resulting body of water was surrounded by a series of low foothill areas covered with woodlands and green fields.[9] One of the city's edges was bordered by tall mountains, the top of which is often shrouded in snow.[1] In the morning light, the waters of Aldera's lake shone a sparkling icy-blue.[9] Across the water from the city lay a vast wilderness that was quite close to Aldera, although not part of it. That zone of grasslands contained a small valley from which one could get a glimpse of the capital in the distance.[10]
Like the other few metropolitan areas of the planet, Aldera was designed in such way that the natural landscape was little affected. With its gleaming white, free-form buildings standing on the uneven slopes of the island, the skyline of Aldera created an artful bridge between the green fields and white clouds.[11] The climate around Aldera was usually temperate,[4] without excluding occasional light snow.[5]
"Aldera housed the embassies of off-planet dignitaries, and was also the home of Senator Bail Organa. Princess Leia Organa spent many years of her childhood there."
―Hari Seldona
Visitors to the city mostly arrived by air, unless they traversed the lake by boat.[3] Upon reaching Aldera, many outlanders were breathtaken at the white, flowing architecture of the buildings, many of them belonging to the planetary government.[9] The most majestic of Aldera's monuments was the Aldera Royal Palace, which housed QueenBreha Organa and her consort, PrinceBail Prestor Organa in the last decades of the Galactic Republic.[1] While the Palace's towers were high and occupied a wide stretch of ground, some of the buildings located west of them were tall enough to obstruct the view.[12]
In addition to being the royal seat of Alderaan, the capital city was also home to the main core of the most prestigious University of Alderaan[3] and the most high-tech Aldera Universal Medcenter.[6] On a more mundane level, the city also contained a Spacer Quarter—in which many bars and hotels could be found[6]—and a marketplace.[12] The planet's primary spaceport was also located in the outskirts of Aldera.[6] The spaceport's main docking facility was hosted in a cluster of hemispherical buildings.[13]
The royal city of Aldera already existed as early as 719 BBY—the date around which the Palace was built[1] —during a period known as the Great Peace of the Republic.[14]
At some point between 1 and 0 BBY,[15] the Star Tours travel agency organized trips to Alderaan as part of their Star Tours Getaway Package. The company's StarSpeeder 1000 spacecrafts would notably bring their passengers to the capital city of Aldera. At that time, Alderaan was considered the safest planet in the galaxy.[16] However, the city was destroyed, along with the rest of Alderaan, by the Death Star in 0 BBY.[2]
Tens of thousands of Alderaanians had been off planet when it was blown up, allowing them to survive. Gradually, the disparate groups of survivors[12] ended up forming the Alderaan Alliance[17] and moved to New Alderaan. On their new world, the refugees built New Aldera, an exact replica of their lost capital.[18]