There were quite a few important inventions in the middle ages. To choose one, my personal favorite is the chimney, which was invented in Northern Europe in the 11th or 12th century, and which made it possible for people to have fireplaces for the first time in history. Of course, I would not belittle the importance of the printing press, which was invented in the Late Middle Ages, as is well known, but the Renaissance also claims the printing press, and the fireplace is purely medieval.
There is a link below to a related question whose answer lists other important medieval inventions and provides a rather simplistic comparison of the creativity of the Middle Ages with that of the Renaissance.
There were several technological advances in the Early Middle Ages that paved the way for the High Middle Ages. One was the invention of the horse collar. Another was the heavy plow. Another was the three field system of crop rotation. Yet another was the horse shoe. Among them these increased agricultural production in Europe quite a lot, making it possible to support the towns and cities of the High Middle Ages. Another set of technologies were the invention of the stirrup and the arched saddle. These combined with the introduction of a new type of lance and the tactics to use it radically altered the technology of warfare and made the mounted knight paramount on battlefields of the High Middle Ages. There is an important point to be made here, however. The advances that caused Europe to pass from the Early Middle Ages to the High Middle Ages were more social and political than technological. The technological developments above were not things developed or invented immediately before the High Middle Ages, but introduced over a long period, and their effects accumulated slowly.
The products of modern technological civilization are far too numerous to list. Essentially, every invention that we have developed since the middle ages is based on science.
castles were important in the middle ages mainly in 1066 and onwards
Johannes Gutenberg introduced the invention of printing which helped improve the Middle Ages. He was a goldsmith, printer, and a publisher.
itw as important because in the middle ages there was lots of war and violence
Sex, murder, and farming are all equally important in the middle ages
the invention of the cannon
The most important musicians during the Middle Ages were priests and those who worked for the church.
Because religion was so important during the Middle Ages, most people owned Bibles.
yes
an officer in the house of important nobles in the middle ages in the french administration system was a officer in the house of important nobles in the french administration of the middle ages
i cant