Yep. Just had a similiar situation happen to me, where my long time friend Ethiopia started converting my cities into his religion. At first, i didnt care as i had grand temples and stuff on my holy city so i knew it eventually it woudl regain its pressure and my religion was the world religion. So for the meantime, i went and conquered the central part of the map, as Rome, whilst Ethiopia (unbeknownst to me) set out to do a global world religion domination. After a while, Ethiopia proved too much more of a nuisance than an ally, conquering Japan's cities which left one of my cities in the middle of his expanded kingdoms. So I went out and conquered his cities, liberating Japans' to reduce warmonger penalties, leaving him with only one city left. Feeling proud, with my new truly Roman-like empire, i had my troops return home, my units garissoned and reduce my gold costs as it was a whopping -80 (when i would normally have it at +100), by reestablishing relationships, trade routes and trade deals. Amidst all this, knowing that this is my time to set my Catholicism to spread from the central-east, i tried to purchase a Great prophet. Confused why i couldnt it turned out i couldnt and hAd my religion wiped out except for in my holy city. The followers of the religion were 10-9 with Ethiopia's teengriism the slightly more dominant religion but with insane pressure of 36-20 and so i thought on accepting Teengrism so i checked its relgiious benefits until i saw Ethiopa's religion control, his controlled all of the cities by religion 33-1 except Mongolia's Buddhism. To my shock, i realised all the pressure was caused by the 7 trade routes from all the different Tengriism cities, so to stop this i relocated all my caravans away despite the much reduced income, thinking it wasnt going to be permanent as i still had 3000 gold left after the costs of the war, despite the negative income. Now after finally succesfully waiting and relocating my caravans awawy, i saw that the pressure has significantly reduced to 20-20, from 36-20, but there was still 1 active trade route. From my well established friend, Japan, who's cities surrounded my seaport city where I relocated my caravans to. So to deal with this i sent a huge portion of my units to that city, as defence, declared war to rid my city of thatnlast pressure. Only to leave Rome with pressures of 20-14 which left the follower count stagnant and unchanged even aftern waiting 20 turns. And by warring the only city that still liked me, all of the other nations had denounced me leaving me unable to amend my relations with all of them as they all declared war on me (except China who was recovering from a war with Mongolia) which eventually resulted in me loosing my superpower status from number 1 with pointiest sticks of 6k to the last with 800 (during the modern era). Now, i guess since you have stuck and read this for so long, all i gotta say is, Ethiopia that bastard had the last laugh after all. Leaving Me A Valuable Lesson learnt:F*** Relgion.