<story><title>Berlin Key</title><url>https://en.wikipedia.org/wiki/Berlin_key</url></story><parent_chain><item><author>umanwizard</author><text>Well, TIL. Never realized this was a US-specific thing.</text></item><item><author>wazoox</author><text>I&amp;#x27;ve never seen that outside the US. Keyholes both sides of the door, everywhere. When it&amp;#x27;s closed, you need a key or you don&amp;#x27;t get out.</text></item><item><author>umanwizard</author><text>What country do you live in? In the US, almost every door I’ve ever seen can be unlocked from the inside (but not the outside) without a key.</text></item><item><author>chrisseaton</author><text>&amp;gt; As it&amp;#x27;s impossible to leave the building without a key in case of a fire.&lt;p&gt;Isn&amp;#x27;t that the case for most doors that lock? You can&amp;#x27;t leave through my (brand new, to-code) front door from inside without a key to unlock it first.&lt;p&gt;It wouldn&amp;#x27;t be secure if you could open it without a key - isn&amp;#x27;t that the whole point of a lock with a key?</text></item><item><author>odiroot</author><text>I&amp;#x27;m surprised some houses still use this. As it&amp;#x27;s impossible to leave the building without a key in case of a fire.&lt;p&gt;I suspect it may even be illegal today.</text></item></parent_chain><comment><author>lillesvin</author><text>It&amp;#x27;s definitely not US specific. Here in Denmark it&amp;#x27;s standard that the front door opens from the inside without a key. Same goes for at least Luxembourg and Germany as far as I know.</text></comment>
<story><title>Berlin Key</title><url>https://en.wikipedia.org/wiki/Berlin_key</url></story><parent_chain><item><author>umanwizard</author><text>Well, TIL. Never realized this was a US-specific thing.</text></item><item><author>wazoox</author><text>I&amp;#x27;ve never seen that outside the US. Keyholes both sides of the door, everywhere. When it&amp;#x27;s closed, you need a key or you don&amp;#x27;t get out.</text></item><item><author>umanwizard</author><text>What country do you live in? In the US, almost every door I’ve ever seen can be unlocked from the inside (but not the outside) without a key.</text></item><item><author>chrisseaton</author><text>&amp;gt; As it&amp;#x27;s impossible to leave the building without a key in case of a fire.&lt;p&gt;Isn&amp;#x27;t that the case for most doors that lock? You can&amp;#x27;t leave through my (brand new, to-code) front door from inside without a key to unlock it first.&lt;p&gt;It wouldn&amp;#x27;t be secure if you could open it without a key - isn&amp;#x27;t that the whole point of a lock with a key?</text></item><item><author>odiroot</author><text>I&amp;#x27;m surprised some houses still use this. As it&amp;#x27;s impossible to leave the building without a key in case of a fire.&lt;p&gt;I suspect it may even be illegal today.</text></item></parent_chain><comment><author>Sharlin</author><text>Add Finland to the list. Pretty much all of Central and Northern Europe I believe. I don&amp;#x27;t think I&amp;#x27;ve ever seen a residential exterior door that needs a key to open from the inside.</text></comment>