The opening theme is reprised in "Con mortuis in lingua mortis," which is the only part not drawn from the same source as the others.  Other sections include "The Ballet of the Chicks in Their Shells" and "Il vecchio castello." More famous are the musical depictions of the rich and poor "Two Polish Jews;" the quarreling French market women in "The Marketplace at Limoges;" and the ox-drawn cart in "Bydlo."  In its most famous orchestration the solo passage in the Old Castle is played by an alto s
The opening theme is reprised in "Con mortuis in lingua mortis," which is the only part not drawn from the same source as the others.  Other sections include "The Ballet of the Chicks in Their Shells" and "Il vecchio castello." More famous are the musical depictions of the rich and poor "Two Polish Jews;" the quarreling French market women in "The Marketplace at Limoges;" and the ox-drawn cart in "Bydlo."  In its most famous orchestration the solo passage in the Old Castle is played by an alto saxophone, and the opening Promenade is given to a trumpet.  Culminating in "The Great Gate of Kiev," it was inspired by a showing of water colors and drawings by Victor Hartmann.  FTP, name this piano suite of Mussorgsky's, famously orchestrated by Ravel.
The opening theme is reprised in "Con mortuis in lingua mortis," which is the only part not drawn from the same source as the others.  
Pictures at an Exhibition