What is the focal point of this artwork?

What computer software program was used to create the design for the structure above? what is the main advantage to this program?

Above is a picture of one of the most famous discoveries ever to be found in china. answer the following questions: - what does the picture show? - when and where was it discover? - who discovered it and what was he doing when he/she discovered it?

What instrument was developed during the early modern period of the twentieth century