Time is an abstract concept that human beings try to measure with material objects throughout their lives. With the images left by us and the events around them, we find a place in our thinking world, our lives. In communities living on earth, it was an effort to visit him, to know time in his time and to give meaning to it. Mankind has put names in time like past, present and future, and has made efforts for ages to measure time. He developed time-measuring instruments using the materials closest to him. They used sundials as well as sand, oil and water-operated clocks. The use of these clocks, which were built on the facades of the buildings of the Anatolian Seljuks, Beyliks and Ottoman Periods and in the needed areas and still survive until the beginning of the 20th century, continued in Turkish Culture. Parallel to these, Astrolob / Usturlap, Rub Tahu Board and Kiblenumas were used. Over time, these developed into mechanical watches. There have been many publications about clocks, clock towers and muvakkithanes indicating time. However, the understanding that shaped the concept of time and the sciences and scholars, professions, tools and materials and the integration of the complementary activities that are formed around each other are not mentioned. Due to the fact that prayer and fasting in Islam is closely related to time, a great sensitivity has been given to the measurement of time in Turkish-Islamic societies. It was determined from the documents obtained during this study on more than one hundred and thirty foundations that were given interim examples, that the muvakkitlik profession, which European scientists attributed to the end of the 13th century, was performed in Anatolia a century ago. For these works, which were previously carried out within the structures of madrasah, library, mosque, then again, the construction of independent buildings near and near the buildings was brought to the agenda. The instruments showing the altitude used to measure the necessary time in the hardware of these structures are the clocks that indicate the time and the types that developed over time, forming the other ring of this circle. Again, in the perception of time, the definitions of months, years, days and blessed days and nights in certain slices of time are given. The most important aim of this study is to reveal how the foundations, which have an important place in Turkish-Islamic culture and reached its peak in the Ottoman Period, played a role in shaping the concept of time. In this context, the developing occupations, monumental structures such as muvakkithane, clock towers and clocks which are used today in these structures as movable cultural assets, and usturlab / octat / altitude device / rubu board, will be determined. The geography in which the perception of time shaped in Ottoman society changed over time and its reflections on institutions and architecture will be discussed. [ABSTRACT FROM AUTHOR]