Study of a Woman's Head or of the Angel of the Vergine delle Rocce by Leonardo da Vinci is an example of metalpoint, a drawing technique in which a stylus with a point of gold, silver, or some other metal was applied to a sheet of paper treated with a mixture of powdered bones (or lead white) and gumwater. What are some of the limitations of using this medium? Choose all that apply.

Writing: article there are always new structures being erected. one new project is china’s central television building located in beijing, china. the odd-shaped skyscraper designed by dutch architect rem koolhaas is expected to cost nearly $800 million. there are mixed feelings about the structure, most of which are about its shape and size in the middle of the city. you will conduct research about one new construction of your choice. search through local newspapers or online architecture periodicals and select one new building to explore. write an essay addressing the following prompts: • location of new building • purpose and proposed function of new building • cost of construction • architect who designed building • materials used to construct building • reaction by others • expected completion date • include an image or link to an image of structure