Simplify the following text for a Grade 6 native English-speaking person.
Original: The current building was erected in the 1890s on the site of the old Bolshoi Theatre of Saint Petersburg and still preserves the grand staircase and landing from that historic theater .
Simplified: The building we see today was built in the 1890s where the Bolshoi Theatre of Saint Petersburg had stood . It still has the grand staircase and landing from that historic theater .