A federal arts commission Thursday voted to approve designs for President Donald Trump’s planned 250-foot triumphal arch, advancing the project amid public opposition and some confusion on the panel.

Thursday’s vote by the Commission of Fine Arts, whose job is to vet the design of monuments and other major projects in the capital, represents a key approval as the White House seeks to begin construction. Another panel that oversees federal construction projects, the National Capital Planning Commission, is set to review the proposed design for the arch June 4.