Boston Marathon bombing memorial to feature 18-foot lighted poles

The official memorial to the Boston Marathon terrorist bombing in 2013 will feature three 18-foot glass light poles, encircled by bronze framing, and twisted stone pillars that lean into each other.

Rendering via City of Boston

That is according to plans that the city unveiled on May 24. The memorial will be erected on a red-brick extension of the Boylston Street sidewalk where the two bombs went off near the marathon finish line on April 15, 2013.

The attack killed three and injured more than 260. The pillars commemorate those killed.

The city hopes to finish the memorial by 2020.

• City releases renderings of Boston Marathon bombing memorial [Globe]