Construction progress of Telliskivi 60/2 and 60b (later other photos too).
29.04.20 other photos.
As Jaak Juske explained, the factories as big buildings were designed by other big buildings at the time: the churches. Hence the similar architecture. It looks like back then at the end of 19th century nobody could imagine building something so simple and bland as a cube-like factory: it took many decades, maybe over half century to reach this higher level invention so the old was suitably expanded to meet the new design standard as visible here.