Pittsburgh Opera resident artist Danielle Pastin makes an impassioned plea to fellow resident artist Jonathan Beyer in a scene from a previous free concert at Hartwood Acres. A free concert of opera and Broadway favorites by Pittsburgh Opera artists is planned at 7:30 p.m. Sunday at Hartwood's amphitheater, 200 Hartwood Acres.

PITTSBURGH — The Pittsburgh Opera company again this year will give a free concert of opera and Broadway favorites at 7:30 p.m. Sunday at Hartwood's amphitheater, 200 Hartwood Acres.

Performing will be Katy Shackleton-Williams, soprano; Olga Perez-Flora, mezzo-soprano; James Flora, tenor; Dan Kempson, baritone; and Mark Trawka, piano. For more information, call 412-281-0912 or 412-767-9200.

A completely different opera company, the Opera Theater of Pittsburgh, will end its 2010-11 season with a modern American love story, staged in Lawrenceville's historic Allegheny Cemetery.

In collaboration with Attack Theater, “Euridice and Orpheus” will be presented at 7:30 p.m. today through Saturday at the cemetery at 4734 Butler St. in Pittsburgh. Gates open at 6:15 p.m. Rain dates are Monday and Tuesday. The shows will be preceded by a performance of Schubert's “Shepherd on the Rock.”

Tickets to the Opera Theater of Pittsburgh's “Euridice and Orpheus” are $55 with a chair provided or $35 if guests provides their own chairs or blankets. Discounts are available with the following codes: “float” for 20 percent off today's show, “picnic” for four tickets for the price of three, and “june” to save 10 percent. Call 412-456-6666 or visit www.pgharts.org.Also, an after-party on Saturday with Ricky Ian Gordon, the composer of “Euridice and Orpheus,” has tickets available for $50 at the website www.operatheaterpittsburgh.org.

The Opera Theater of Pittsburgh will stage a modern American love story in the historic Allegheny Cemetery.“Euridice and Orpheus” will go on at 7:30 p.m. todaythrough Saturday at the cemetery, 4734 Butler St., Pittsburgh.