Kurier and OE24 contemporaneously documented Rihanna inside Park Hyatt Vienna and returning after a night out using Snapchat material from her circle; TMZ separately identified a couple-of-nights Royal Penthouse booking and carried Rihanna's morning Snapchat from the suite.
Rihanna stayed at Park Hyatt Vienna during the Vienna stop of her Anti World Tour in August 2016. Contemporary Austrian coverage placed her inside the hotel before a night out and documented her return, while a separate report identified the accommodation as the property's Royal Penthouse Suite and described the booking as lasting a couple of nights.
Source conclusion:
The cited sources support a stay at the named hotel.
