A woman walking alone in Stoa Attalou in Greece. The Stoa of Attalos also spelled Attalus was a stoa covered walkway or portico in the Agora of Athens, Greece.[1] It was built by and named after King Attalos II of Pergamon, who ruled between 159 BC and 138 BC. The current building was reconstructed in 1952ââ¬â1956 by American architects along with the Greek architect Ioannis Travlos and the Greek Civil Engineer Yeoryios Biris.