The Lower Manhattan Development Corp. (LMDC) unveiled Wednesday proposals for new buildings to replace the World Trade Center towers destroyed in the September 11 attacks. Seven international architecture and design firms were chosen from more than 400 that presented plans to LDMC. This was the second round of proposals for the site; the first group of designs was met with a lackluster response.

Four of the seven designs propose the construction of the world’s tallest structures. Each of the proposals includes a memorial to those killed in the attacks. The work created by the project could not come sooner for New York electrical workers who have watched the unemployment rate for their industry rise to 15% in the past month.

The final plans will be chosen by Jan. 31.