Knossa
the site of an ancient spaceport on the planet Ossus, Knossa was one of the primary cities of Ossus some 4,000 years before the Battle of Yavin. The city was best-known for the two huge, Adegan crystal obelisks that stood in the city's central plaza. Each year, the moons of Mim and Nerit aligned themselves with respect to the obelisks, and the reflected light created an incredible, dazzling display when passing through the crystals. Although much of the city was destroyed during the Great Sith War, the day on which the alignment took place was recognized as Ossus Day during the succeeding millennia.