the completion of Horton Plaza, the Gaslamp Quarter revival, and the completion of the San Diego Convention Center. Petco Park, a baseball ballpark used by the San Diego Padres, opened in 2004. Chinatown In the 1860s, the first Chinese moved to Downtown. In the 1870s, the Chinese were the primary fishermen in the area. Beginning in the 1880s, a large number of Chinese began to move to San Diego, establishing a concentration; with up to 200 Chinese making up a minority of the 8,600 who lived in all of San Diego. At its peak, about a thousand Chinese lived in San Diego and were faced with discrimination. The concentration became known as Chinatown, and an effort to demolish the area due to the Panama-California Exposition was attempted but the area continued on until World War II. Beginning in the early 1900s, Filipinos began to move to San Diego, and settled in and near Chinatown. In 1995, the Asian Pacific Thematic Historic District was created to preserve the remaining structures that remained from the era when Chinatown, as well as Nihonmachi (Japantown), existed. While a few of the buildings remain, there no longer exist a significant concentration of Chinese Americans in the former neighborhood. Geography Located in Central San Diego, Downtown San Diego is delimited by San Diego Bay to the west and southwest, Bankers Hill, Middletown, and Balboa Park to the north, Sherman Heights and Golden Hill to the east, and Barrio Logan and Logan Heights to the southeast. San Diego International Airport is just northwest of downtown. Districts and neighborhoods Columbia, the west district of downtown. Located between the Marina and Little Italy, west of Columbia Street. Core District, the central business district of downtown. Cortez Hill, the northeast district of downtown. East Village, the east district of downtown, which is home to Petco Park and the surrounding Ballpark Village. Gaslamp Quarter, a two- by ten-block nightlife district in central Downtown Little Italy, the northwest district of downtown. Marina, the southwest district of downtown, which is home to Seaport Village and Pantoja Park. Architecture Due to San Diego International Airport (Lindbergh Field)'s proximity to downtown, there is a FAA imposed 500-foot height restriction on all buildings within a 1.5-mile radius of the runway. The height regulation exists because when planes approach the airport, any structure taller than 500 feet within the radius could interfere with flight operations and potentially