(Updated at 12:15 p.m.) The work of nearly 100 volunteer knitters and crocheters, a group dubbed the “Guerrilla Stitch Brigade,” is now on display for all the world to see in Rosslyn.

A stretch of Rosslyn from the Metro station to Artisphere (1101 Wilson Blvd) was “yarn bombed” on Sunday, as volunteers affixed their elaborate knits to trees, fences, parking structures and even a piano. Most of the knits — more than 1,000 stitched geometric shapes, which took some 20 weeks to create, affixed to a dozen different objects — are along Wilson Boulevard. The piano, however, is in Artisphere itself.

“The intent of this project is to lead people to Artisphere, Arlington’s visual and performing arts center,” Rosslyn Business Improvement District Executive Director Cecilia Cassidy said in a statement.

The yarn bombing is the the first of three temporary public art projects planned by the Rosslyn BID this spring, the organization said. The other projects include another yarn bomb installation, in an as-yet undisclosed location, and a fiber art installation from artist Rachel Hayes that will adorn Rosslyn’s skywalks on N. Moore Street, Nash Street and Fort Myer Drive.