The Sun Link sparked a movement to redevelop downtown buildings and helped bridge the physical divide created by Interstate 10 in the 1960s, which split the city in half. In the early 20th century, cities consisted mostly of local businesses and small buildings, Powe said. In 1999, Los Angeles adopted its Adaptive Reuse Ordinance as to repurpose old buildings into residences. However, it’s a balancing act between preserving the culture associated with old buildings and leaving room for new development as more people move into town. Historical preservation has focused on affordability explicitly rather than just using old buildings for new luxury development.