The Burgu Arjaan by Rotana and Tango Arjaan by Rotana, both in Istanbul, will officially open their doors on 1 June.
The two properties will offer three meeting and conference rooms and add a total of 318 bedrooms to Rotana’s existing 13,359-strong room count.
Other facilities include a lounge café, business centre, indoor and outdoor pools, restaurant, and a fitness club.
They are located in Istanbul’s Maltepe district, a short commute from Sabiha Gokcen International Airport and Bagdat Avenue famed for its shops.
Omer Kaddouri, president and CEO of Rotana, said: "A breakthrough into Turkey is a significant achievement for Rotana as it’s a crucial territory to penetrate for us to solidify our standing as a leading hotel management company.
"The new properties will offer Rotana’s signature blend of comfort and refinement, complemented by upgraded business and leisure facilities and a wealth of dining options."
Rotana has worked with Turkish property development and construction company Dap-Yapi on the project.
Dap-Yapi's chairman, Ziya Yilmaz, said Rotana's "well-timed" entry into the Turkish market promises to shake up the competitive dynamics of Istanbul’s hotel sector.
Rotana has also signed further agreements with Dap-Yapi for two new properties, the Dalga Residences by Rotana and Vazo Residences by Rotana.