Ottoman Public Debt Administration

Also, it was an intermediary with European companies seeking investment opportunities in the Ottoman Empire.

The financial and commercial privileges of the non-Muslim foreigners were protected with the capitulations of the Ottoman Empire.

Non-region specific taxes were also provided, notably on shops and stores, and customs duties.

Should those sources of income prove insufficient, the OPDA was also empowered to a share of foreign indemnities paid to the Ottomans by various Balkan states as a result of the Treaty of Berlin.

[5]: 41  The indemnities were of little comfort to the Ottomans anyway, because the treaty had also greatly reduced the size and population of the Empire, and thus its tax base.

The Istanbul High School building was originally constructed as the Ottoman Public Debt Administration (OPDA) headquarters.
Duty stamps from the Ottoman Public Debt Administration