Donald Trump is causing an aesthetic hubbub in Chicago with five simple letters: T-R-U-M-P. 
 
 The developer is fending off critics of a sign that is being added to the most visible façade of the Trump International Hotel and Tower Chicago, Chicago's second-tallest building. 
 
 The sign is the latest bit of drama for a building with an... 

 Chicago's skyline is about to change again. The signature sign on the Trump International Hotel & Tower is one letter away from completion, but not everyone sees the sign as a positive addition. NBC 5's Rob Elgas reports. (Published Friday, June 6, 2014) 
 
 Not a fan of the TRUMP sign being added to Chicago's second-tallest building? Neither is Rahm Emanuel. 
 
 That's according to mayoral spokesman Kelley Quinn. 
 
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 Donald Trump is Erecting Giant Letters That Will Spell Out "TRUMP" on His Namesake Building. (Published Wednesday, May 7, 2014) 
 
 “Mayor Emanuel believes this is an architecturally tasteful building scarred by an architecturally tasteless sign," said Quinn. "The sign -- which was already reduced in size and scope -- does comply with the provisions of the planned development ordinance and the City Council sign order, but he has asked his staff to determine if there are any options available for further changes.” 
 
 The 20-foot-tall, illuminated letters spelling real estate mogul Donald Trump's last name began going up last month on the side side of the Trump International Hotel & Tower, at 401 N. Wabash Ave. 
 
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 The building's architect earlier this week went on record with his disapproval of the letters. 
 
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 "I think it hurts the image of the building and is done in poor taste. It also hurts the image of Chicago. How could the City officials that must approve these signs let this happen?" Smith said in an email to NBC Chicago. 
 
 Trump has defended the lettering. In a Tuesday post in the Wall Street Journal he's quoted as saying it's "great for Chicago, because I have the hottest brand in the world." 
 
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 No version of the sign was part of the building's original plans that were approved by the Chicago City Council in 2002. The council in 2009 approved a sign measuring 3.600 square feet. Once completed, the TRUMP sign will cover 2,891 square feet, the Chicago Tribune reported. 
 
 Emanuel was inaugurated as Chicago's mayor in 2011.
– Donald Trump isn't taking kindly to suggestions that slapping his name in 20-foot tall illuminated letters on the side of Chicago's second-tallest building might be a little tacky. Mayor Rahm Emanuel—who thinks the Trump International Hotel and Tower Chicago is an "architecturally tasteful building scarred by an architecturally tasteless sign," according to a spokeswoman—has become the latest to weigh in on the controversy, but even the building's architect considers the huge sign pretty tasteless, NBC reports. It points out that once the sign is done, the letters will cover 2,891 square feet. "I think it hurts the image of the building and is done in poor taste. It also hurts the image of Chicago," says architect Adrian Smith, wondering why officials ever approved it. Trump, however, says the sign "is great for Chicago, because I have the hottest brand in the world," and dismisses the architect's misgivings. "I had more to do with the design of that building than Adrian Smith did," Trump tells the Wall Street Journal. "The best thing that ever happened to Adrian Smith is Donald Trump." Smith says that if Trump "claims he did the building, that's fine, because it means he likes it. He'll probably never hire me as an architect again, but at this stage I don't really care."