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The Renaissance era was from 1400 to 1600. It was characterized by greater use of instrumentation, multiple interweaving melodic lines, and the use of the first bass instruments. Social dancing became more widespread, so musical forms appropriate to accompanying dance began to standardize.

What era was from 1400 to 1600? 
Answer: Renaissance
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The University of Notre Dame du Lac (or simply Notre Dame /ˌnoʊtərˈdeɪm/ NOH-tər-DAYM) is a Catholic research university located adjacent to South Bend, Indiana, in the United States. In French, Notre Dame du Lac means "Our Lady of the Lake" and refers to the university's patron saint, the Virgin Mary. The main campus covers 1,250 acres in a suburban setting and it contains a number of recognizable landmarks, such as the Golden Dome, the "Word of Life" mural (commonly known as Touchdown Jesus), and the Basilica.

The French words Notre Dame du Lac translate to what in English?
Answer: Our Lady of the Lake
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One of the first demonstrations of the ability for telecommunications to help sign language users communicate with each other occurred when AT&T's videophone (trademarked as the "Picturephone") was introduced to the public at the 1964 New York World's Fair –two deaf users were able to communicate freely with each other between the fair and another city. Various universities and other organizations, including British Telecom's Martlesham facility, have also conducted extensive research on signing via videotelephony. The use of sign language via videotelephony was hampered for many years due to the difficulty of its use over slow analogue copper phone lines, coupled with the high cost of better quality ISDN (data) phone lines. Those factors largely disappeared with the introduction of more efficient video codecs and the advent of lower cost high-speed ISDN data and IP (Internet) services in the 1990s.

In what decade were more efficient ways of using sign language via video-telephony developed?
Answer:
1990s