This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 22 February 2014, 10:28 by Flying Saucer. On that date, it was confirmed to be licensed under the terms of the license indicated.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This image features an architectural or artistic work, photographed from a public space in Estonia. There is no commercial freedom of panorama in Estonia, but non-commercial content does not conform to Commons:Licensing.
Nevertheless, this image should be fine and can be used for commercial purposes as it incorporates no such single copyrighted work of architecture, sculpture, or graphic art as the main subject. Cropping or framing this image to focus on the said work is a copyright violation, however.