Sentence:  The ninth century was in its artistic <WSD>work</WSD> `` the spiritually freest and most self-sufficient between past and future '' , and the loving skill spent by its artists upon their products is a testimonial to their sense that what they were doing was important and was appreciated . 
Meaning of the word marked with <WSD> tags:  a product produced or accomplished through the effort or activity or agency of a person or thing