One of the most painstaking architectural renewals in recent Los Angeles memory has finally pulled a world-class jewel of modern architecture from obscurity. Designed by pioneering Modernist architect Richard Neutra in 1928, with limited collaboration from another Modernist icon, Rudolph Schindler, the Jardinette Apartments had been hiding in plain sight on an unassuming Hollywood street for nearly a century. The complex was a technical and spatial breakthrough, and quickly gained international renown as one of the earliest International Style structures in the United States, not to mention Neutra’s first L.A. commission. But the building’s original owner, Joseph H. Miller, went bankrupt during construction and skipped town to avoid his creditors, and the Jardinette slipped from view. “After that early burst, it just disappeared,” said Barbara Lamprecht, historical consultant for the Jardinette’s rehabilitation, which is just now wrapping up. For decades the building stood quietly along West Marathon Street: an austere, four-story complex that most people passed without a second glance. Wedged between Western Avenue and Manhattan Place, amid stucco apartment blocks and scrappy bungalows, the …