Collage by Murderdoll1122. Photograph authors and links (from top to bottom, left to right):

• Panorama of Sliven: File:Sliven Panorama.jpg, Zako d, public domain
• The Municipality of Sliven building: File:Municipality-of-Sliven.jpg, Edal Anton Lefterov, Creative Commons Attribution-Share Alike 3.0 Unported
• The theatre: en:File:Dramatic Theatre Sliven.jpg, en:User:Vlado4, Creative Commons Attribution-ShareAlike 2.5 License
• The statue of Hadji Dimitar: en:File:Hadji Dimitar.JPG, Valentin Markov DudeBoy (en:User:ComradeGeneral), Creative Commons Attribution-ShareAlike 3.0 License
• The house-museum of Hadji Dimitar: File:Sliven Hadzhi Dimitar.JPG, Nikolov2010, public domain
• The church: File:Saint-Dimitrius-church-in-Sliven.jpg, Edal Anton Lefterov, Криейтив Комънс Признание — Споделяне на споделеното 3.0
• The tower: File:Clock-tower-of-Sliven.jpg,Edal Anton Lefterov, Криейтив Комънс Признание — Споделяне на споделеното 3.0.
• The bust of Hadji Dimitar: File:Hadji Dimitur.JPG, Original uploader was Svik at bg.wikipedia, GNU Free Documentation License.
• The 19-century house: File:19-20th-century-lifstile-museum.jpg, Edal Anton Lefterov, Криейтив Комънс Признание — Споделяне на споделеното 3.0.