Question:
Which employer did Fotos Politis work for in Aug, 1930?

Context:
 Fotos Politis works for National Theatre of Greece - Ziller Building from Jan, 1930 to Dec, 1934. 
 Fotos Politis works for To Vima from Sep, 1927 to Jan, 1929. 
 Fotos Politis works for General State Archives from Jan, 1919 to Jan, 1925.

Answer:
National Theatre of Greece - Ziller Building