Ansys, Amdocs, Cloudflare, Instarecon, Phonak, Power World, Caterpillar Simulation Center, and Volition. The largest high technology employer is Wolfram Research, with more than 400 employees in Champaign. The United States Army Corps of Engineers maintains the Construction Engineering Research Laboratory (CERL) in Champaign. Startups The Champaign-Urbana community is a well-known hub for startups, including a top ranking from Silicon Prairie News in 2019. Arts and culture Landmarks and districts Downtown In the 1980s, part of the downtown Champaign area (Neil St.) was closed to vehicular traffic to create a pedestrian mall, but this short-lived experiment was scrapped when business declined. As part of a revitalization effort, One Main Development constructed two new mixed-use buildings: One Main and M2 on Neil. The City of Champaign gave $3.7 million in tax incentives for the building of M2 and agreed to pay nearly $11 million for a new parking deck. This growth in downtown Champaign coincided with the larger growth of the "north Prospect" shopping district on the city's northern boundary. The growth in the north Prospect area relied, in part, on leapfrogging, moving out to the countryside and developing more remote farm land that eventually connects to the main development. Given the overwhelming success of such suburban shopping areas nationally, new development within any city center represented an alternative to the dominant movement out and away from the cities. In April 2007, One Main Development broke ground on M2 on Neil, a nine-story, $40 million, mixed-use project – the largest ever for downtown Champaign – located at the corner of Neil and Church Street. M2 on Neil features retail and office space, and 50 upscale condominiums. The project was expected to be complete in late 2008, but experienced delays in construction, partially due to $5 Million in mechanics liens filed against One Main Development, as well as a large fire on an adjacent property that caused substantial facade damage to M2. Construction on the commercial shell and core and the residences was completed in the Summer of 2009. New condo owners began moving into M2 in April 2009 and the first ground-floor tenant, a branch of local BankChampaign, opened its doors in November 2009. Destihl, a restaurant and brewpub, opened in Spring 2011, and two other restaurants opened in ground-floor space in Fall 2011. The City of Champaign has constructed a six-story parking structure on Hill Street adjacent to M2, intended to