German 800 silver necklace with KOLN Church Cute

This came with a pile of sterling jewelry I bought, but it is only 800 coin silver, but I love it! I have been to KOLN when I was 21 and maybe 23 years old. Stayed at youth hostel, I think it was on top the hill in a castle! About 75 cents a night, then we had Europe on $5.00 a day!! I got this book of tickets for hitchhiking! If someone picked you up, you gave them a ticket and they I guess mailed it in and could win a washer or radio! haha I do not know how long that lasted! The chain is over 20 inches long. great job on Church! The Church is really beautiful! Inside too. Maybe I will wear this some! Thanks for looking OOPS I MEAN DANKE!!! OH does anyone know what the DOM is for on the bottom of Church?