Tiraspol, Tiraspol, Khersonskaya Gubernia Realschule (secondary school)

Top left:

Тирасполь Херс. губ.
Tiraspol, Kherson Governorate (province)

Tyraspol Chers. gub.
Same thing written in Latin characters — older transliteration.

“Херс. губ.” = abbreviation for Kherson Guberniya, an administrative region in the Russian Empire.

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Top right:

Реальное училище
Real School (a type of secondary technical/academic school in the Russian Empire)

Realna szkoła
Same phrase written in Polish: Real school