San Salvador’s historic center teems with commerce: some 40,000 vendors not only fill the downtown area’s four official markets, but also spill into the surrounding streets, their tarpaulin-covered stalls packed with everything from clothing to electronics, packaged sweets to fresh produce. The national and city governments have embarked on an effort to transform the capital city’s downtown into a tourist attraction, restoring monuments and relocating ramshackle market stalls. A new national library — donated by China — is under construction on the capital city’s civic square, across from the metropolitan cathedral.