For all age groups.
Christianity began in Jerusalem when the first Jews were baptized (see Acts, chapter 2). From there, the movement spread to Europe, Asia and Africa. For many years the church was known under the name of the Lord Jesus Christ until it split into many sects and denominations.
Throughout 2000 years of church history there have repeatedly been groups within Europe who wanted to go back to biblical Christianity. Some of them were quite successful for some time. Because of persecution and for other reasons, many religious people emigrated to America. There, in the 19th century, many churches of Christ sprung up anew as part of the so called Restauration Movement. This movement however was not a purely US-phenomenon because there had been churches of Christ in Great Britain and Ireland years before that. After World War II the hearts of many people in Europe were ready for a new spiritual beginning as well. When American missionaries came to Western Germany after 1945, this led to the establishment of many congregations according to the New Testament pattern.
But something happened in the Eastern part of Germany as well. One example: Even some years before the wall came down in 1989 a house church of Christ started by a German was meeting in Oelsnitz/Erzgebirge. Later on, with the help of that group in Oelsnitz, a small home group was started in Chemnitz which marked the beginning of our congregation. Later on, missionaries from the US helped continue this work. Their long-term goal was training locals to take over responsibility. For quite some years now the church's leadership is in the hands of locals from Chemnitz.
In short: The church of Christ is not an American church nor does it originate in the USA. We are a group where people from all nations may feel at home. The apostle Peter once put it just right: