The 730 hectares that became Kebayoran Baru were originally slated for an airport, planned to replace the cramped Kemayoran field whose runways blocked Batavia's eastward expansion. That idea was scrapped in favor of something more ambitious: a satellite town, a self-sufficient community linked to the colonial capital by rail and highway. The first proposal surfaced in July 1948. By September it was approved. By January 1949 the land had been acquired. In February, the master plan was on paper. In March, the first stone was laid. Five months from concept to construction -- a pace that would be unthinkable today in a city where land acquisition alone can consume years. The architect of this speed was Moh. Soesilo, an urban planner trained in the Centraal Planologisch Bureau and a student of Thomas Karsten, the Dutch engineer whose city plans for Malang, Bandung, and Bogor had defined Indonesian urban design. Soesilo's plan for Kebayoran Baru was the first urban center in the country designed by a native Indonesian.

Soesilo organized Kebayoran Baru into city blocks labeled A through S, each with a designated purpose. Blok E, the westernmost, was the first to be fully developed in 1949, its free-standing villas along Jalan Pakubuwono now counted among the best-preserved examples of post-war architecture in Indonesia. Blok K was the administrative heart, anchored by the Al-Azhar Great Mosque and the Banknote Factory. Blok M was designed as the commercial center -- a market square that would grow into Jakarta's most famous shopping district, a place so well-known that the letter itself became a neighborhood name. The plan allocated 45 percent of the land for housing, 16 percent for green space, 14 percent for shops, and a generous 25 percent for roads. It was rational, geometric, and optimistic. Today, the block letters have been largely forgotten by residents -- except where they survive in the names of markets and bus terminals, ghosts of a vanished grid.

Walk the quieter streets of Kebayoran Baru and you encounter a style of architecture that exists almost nowhere else. The Jengki house -- named from 'Yankee,' a nod to American postwar modernism -- features tilted upper stories that shade the facade below, maximizing natural light while deflecting equatorial heat. Reinforced concrete, flat planes, deep overhangs: these were buildings designed for the tropics by architects who understood that electricity was a luxury and that shade was engineering. Larger villas were designed by prominent Indies architects like Job and Sprey and Liem Bwan Tjie, whose work bridged Dutch colonial design and the emerging Indonesian modernist sensibility. The houses along Jalan Pakubuwono in Blok E are now protected as cultural heritage under Indonesian law, their angular silhouettes a reminder that Kebayoran Baru was not just a plan for a city but an experiment in how independent Indonesia might build.

A proper satellite town, the Dutch planners believed, needed at least 15 kilometers of separation from the city center. Kebayoran Baru got eight. The highway connecting the new town to Batavia -- Jalan Sudirman and Jalan Thamrin, opened in 1953 -- was supposed to remain free of development on both sides. Instead, ribbon development filled in the margins almost immediately, and the buffer between city and satellite vanished. Of the planned 7,050 homes, only 4,720 were built. Of 352 public amenities, only 162 materialized. The garden city's Central Park, Taman Pusat in Blok K, survived as green space only until the 1970s, when government office towers replaced it. Scholars have debated whether Kebayoran Baru was a failure or a different kind of success. Its density far exceeded comparable postwar new towns in Britain -- Silver estimates the core area eventually reached close to 500,000 residents, compared to the 25,000 projected for British equivalents. It was too vital to remain a satellite. Jakarta simply grew to encompass it.

Kebayoran Baru today is an unlikely layer cake. In Mataram Park, a statue of Yuri Gagarin stands among tropical trees, inaugurated to mark seventy years of Indonesia-Russia relations. The Martha Christina Tiahahu Literacy Park near Blok M combines a city garden with a public library, its reading rooms feeding into the transit-oriented development around the MRT station. Along the quiet southern streets, mansions on lots of up to 6,000 square meters house some of Indonesia's wealthiest citizens -- Vice President Jusuf Kalla, media tycoon Hary Tanoesoedibjo, the family of founding president Sukarno. Kebayoran Baru and the neighboring district of Menteng command the highest land prices in the country. Meanwhile, in the northern reaches near Senayan, a concentration of Korean-run businesses has flourished since the 1980s. The radio station that once broadcast from the southwest -- Radio Kebajoran -- is long gone, but its memory persists in the street names Jalan Radio Dalam and Jalan Antene. The garden city's canopy has thinned, but its bones remain legible from the air: the grid, the blocks, the green corridors along rivers that were supposed to be wider.