Sultan Abdul Mecit moved into the newly built Dol-mabahce Palace in 1853 , and by 1909 Topkape was completely abandoned.
Topkape was never inhabited by Sultans.  
mnli hypothesis: Topkape was never inhabited by Sultans.   premise: Sultan Abdul Mecit moved into the newly built Dol-mabahce Palace in 1853 , and by 1909 Topkape was completely abandoned.