Aquae Calidae, Bulgaria local church her imperial robes. In 584 the Avars under Khan Baian conquered Aquae Calidae, but Baian spared the baths at the request of his harem. In one of the churches of the city the Avars found the imperial robes of Anastasia and Baian took them and allegedly claimed control of the empire. The first archaeological excavations were by Bogdan Filov in 1910. In the pools he found over 4,000 coins of various eras, jewelry and other everyday items dated from the 5th to the 13th century. Since 2008 large-scale excavation and reconstruction has taken place. By 2010, an area
Aphanizomenon flos-aquae samples exceeded the safety value of 1 µg microcystin per gram. University professor Daniel Dietrich warned parents not to let children consume "A. flos-aquae" products, since children are even more vulnerable to toxic effects, due to lower body weight, and the continuous intake might lead to accumulation of toxins. Dietrich also warned against quackery schemes selling these cyanobacteria as medicine against illnesses such as attention deficit hyperactivity disorder, causing people to omit their regular drugs. A Canadian study studying the effect of "A. flos-aquae" on the immune and endocrine systems, as well as on general blood physiology, found that eating