The shackled lens

Location description
The building is oddly placed about 300ft from Fenmuzu Auction Rooms, it stands slightly isolated from the other buildings.
What you see outside
A large 3 storey sandstone structure with a large circular lens that floats over the top of a cloister in the middle, multiple archways push through the sandstone exterior creating multiple entry points. Adorning the outside walls are black silken sails that hang flat even if there is a stiff breeze, each sail has a singular circular disc of glass embroidered in red in the centre
What you hear
Soft wails, scraping chains and coughs can be heard as the sound reverberates across the desert sand, it leaves a horrid sense of helplessness in the pit of your stomach.
What smells come from it
The smell of sweat, dry sulphur and salt sting your nostrils
What it looks like inside
Rows and rows of 9ft tall by 4ft wide Glass Cloches are seen inside the large three-storied cloister structure, most are vacant but some house what appear to be frail husks of humanoid creatures, patroling ogres in chains sweep each floor in sets of two keeping an eye on the merchandise waiting for it's day in the sun. The sun however can easily be manipulated by the large glass lens that circles overhead seemingly by remote control to casts the radiant heat of the day across each of the floors fatiguing all who are trapped within the glass domes that are housed on each of the floors.
Who is inside
2 x Chained Ogres per level, a few street merchants checking out the slaves that are available, a black shadowy figure that seems to circle around each of the levels.
  What the store currently has for sale