oh, "Poort" is dutch ... For some reason I translated to "bridge" (which I added) but he meant gate ...
The "gate" is a public way and open and has its own name: https://badmuenstereifelaktiv.de/burg-muenstereifel/ | https://www.google.de/maps/place/Burgportal+Bad+M%C3%BCnstereifel/@50.5554426,6.7651206,3a,75y,90t/data=!3m8!1e2!3m6!1sAF1QipO-3zSGZva3SpmCAXLuVTopgFtkcvqmeVCyXvM!2e10!3e12!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipO-3zSGZva3SpmCAXLuVTopgFtkcvqmeVCyXvM%3Dw203-h360-k-no!7i2252!8i4000!4m5!3m4!1s0x0:0x8434602aa5c59534!8m2!3d50.5554426!4d6.7651206 | https://www.flickr.com/photos/lomo56/8660437294