The four letters — COBO — that have adorned Detroit's convention center for nearly six decades are set to come down next week.

TCF Bank, which through its predecessor Chemical Bank, bought the 22-year naming rights to Cobo Center for $33 million and is set to formally affix its name to the 59-year-old riverfront convention hall Tuesday.

The Detroit-based bank, which completed a merger with Chemical Bank on Aug. 1, has scheduled a 10 a.m. news conference Tuesday in front of the convention center, followed by a community block party the bank is throwing throughout the rest of the day.

In February, the Detroit Regional Convention Facility Authority sold the naming rights of Cobo Center for $1.5 million annually to Chemical Financial Corp., which was in the midst of a $3.6 billion "merger of equals" with Wayzata, Minn.-based TCF Financial Corp.

Bank leaders have previously said the convention hall will be called TCF Center.

The regional authority's sale of the naming rights to Chemical Bank came after some Detroiters began advocating in recent years for a name change in light of former Mayor Albert Cobo's racially charged legacy of carrying out the demolitions of African American neighborhoods and businesses in the 1950s for so-called urban renewal.

The authority's board also sought to sell the naming rights to generate a new revenue source to help the convention center make up for gradually declining state subsidies from hotel, liquor and cigarette taxes.

The merged Chemical-TCF bank has taken the TCF Bank brand as it moves to change branch signage and financial technology for both banks by mid-2020.

TCF Bank will host a block party outside of the convention hall entrance at Washington and Jefferson from 11:30 a.m. to 6 p.m. with free food, face-painting, games and live musical performances by local musical acts Your Generation, the Selected of God Choir and The Temptations.

"The goal there is to really share the renaming of the convention center, to celebrate it and bring everyone together and have some fun," said Amie Hoffner, vice president of corporate communications at TCF Bank.

In an effort to help Detroiters attend the event, TCF Bank is underwriting the cost of all DDOT bus route fares to downtown on Tuesday, Hoffner said. More details at tcfbank.com/detroitblockparty.

The new TCF Bank is trying to raise its profile in the metro Detroit market as the century-old Chemical Bank brand goes away.

In October, the bank is the title sponsor of the Detroit Free Press' annual Detroit-Windsor marathon, a race that Chemical Bank and its predecessor, Talmer Bank & Trust, have sponsored since 2011.

"A lot of planning has gone into raising visibility for TCF there," Hoffner said.