Albert M. Tannler, an architectural historian and author, will give three free talks about 20th-century architecture in Pittsburgh on three successive Thursdays this month in Wilkinsburg.

Mr. Tannler is the author of “Pittsburgh Architecture in the Twentieth Century: Notable Modern Buildings and Their Architects” (Pittsburgh History & Landmarks, $18.95). He is the foundation’s historical collections director.

Each talk will run from 6 to 7:30 p.m. at the Landmarks Preservation Resource Center, 744 Rebecca Ave., 15221. Admission is free, but reservations are appreciated by contacting Mary Lu Denny at 412-471-5808 or marylu@phlf.org. Here’s the schedule:

• Oct. 16: “Some Observations on 20th-Century Architecture in Pittsburgh”: Interesting discoveries about Pittsburgh’s architects, buildings, craftsmen and clients plus a look at how history, economics and the environment influenced and shaped 20th-century design.

• Oct. 23: “Modern Medievalism”: A look at how Henry Hobson Richardson adapted 11th-century Romanesque forms to the 19th and 20th centuries. Pittsburgh has three of his finest buildings — Downtown’s Allegheny County Courthouse and Jail and Emmanuel Episcopal Church on the North Side.

• Oct. 30: “Ornament and Crime”: The influence of Austrian architect Adolf Loos and an exploration of the nature and character of architectural ornament in the United States during the early and late 20th century.

First Published: October 4, 2014, 4:00 a.m.